3649139923 has 8 divisors (see below), whose sum is σ = 4287101616. Its totient is φ = 3062215200.

The previous prime is 3649139909. The next prime is 3649139939. The reversal of 3649139923 is 3299319463.

3649139923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3649139923 - 2⁵ = 3649139891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3649139953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12759088 + ... + 12759373.

It is an arithmetic number, because the mean of its divisors is an integer number (535887702).

Almost surely, 2^3649139923 is an apocalyptic number.

3649139923 is a deficient number, since it is larger than the sum of its proper divisors (637961693).

3649139923 is a wasteful number, since it uses less digits than its factorization.

3649139923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25518485.

The product of its digits is 944784, while the sum is 49.

The square root of 3649139923 is about 60408.1114007051. Note that the first 3 decimals coincide. The cubic root of 3649139923 is about 1539.5607791952.

The spelling of 3649139923 in words is "three billion, six hundred forty-nine million, one hundred thirty-nine thousand, nine hundred twenty-three".