1946309689 has 9 divisors (see below), whose sum is σ = 1965781101. Its totient is φ = 1927030560.

The previous prime is 1946309639. The next prime is 1946309699. The reversal of 1946309689 is 9869036491.

The square root of 1946309689 is 44117.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2205225 + 1944104464 = 1485^2 + 44092^2 .

It is not a de Polignac number, because 1946309689 - 2²¹ = 1944212537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1946309639) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6926229 + ... + 6926509.

Almost surely, 2^1946309689 is an apocalyptic number.

1946309689 is the 44117-th square number.

1946309689 is the 22059-th centered octagonal number.

It is an amenable number.

1946309689 is a deficient number, since it is larger than the sum of its proper divisors (19471412).

1946309689 is an frugal number, since it uses more digits than its factorization.

1946309689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 55.

The cubic root of 1946309689 is about 1248.5443725637.

The spelling of 1946309689 in words is "one billion, nine hundred forty-six million, three hundred nine thousand, six hundred eighty-nine".