939851649 has 27 divisors (see below), whose sum is σ = 1493805859. Its totient is φ = 568993920.

The previous prime is 939851639. The next prime is 939851699. The reversal of 939851649 is 946158939.

The square root of 939851649 is 30657.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18122049 + 921729600 = 4257^2 + 30360^2 .

It is not a de Polignac number, because 939851649 - 2¹⁵ = 939818881 is a prime.

It is a super-2 number, since 2×939851649² = 1766642244256038402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 939851595 and 939851604.

It is not an unprimeable number, because it can be changed into a prime (939851609) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1011217 + ... + 1012145.

Almost surely, 2^939851649 is an apocalyptic number.

939851649 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

939851649 is the 30657-th square number.

939851649 is the 15329-th centered octagonal number.

It is an amenable number.

939851649 is a deficient number, since it is larger than the sum of its proper divisors (553954210).

939851649 is an equidigital number, since it uses as much as digits as its factorization.

939851649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886 (or 943 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The cubic root of 939851649 is about 979.5345731750.

The spelling of 939851649 in words is "nine hundred thirty-nine million, eight hundred fifty-one thousand, six hundred forty-nine".