307990590961 has 3 divisors (see below), whose sum is σ = 307991145931. Its totient is φ = 307990035992.

The previous prime is 307990590923. The next prime is 307990590983. The reversal of 307990590961 is 169095099703.

The square root of 307990590961 is 554969.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 45723696561 + 262266894400 = 213831^2 + 512120^2 .

It is not a de Polignac number, because 307990590961 - 2⁹ = 307990590449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 307990590896 and 307990590905.

It is not an unprimeable number, because it can be changed into a prime (307990590991) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 277485 + ... + 832453.

Almost surely, 2^307990590961 is an apocalyptic number.

307990590961 is the 554969-th square number.

307990590961 is the 277485-th centered octagonal number.

It is an amenable number.

307990590961 is a deficient number, since it is larger than the sum of its proper divisors (554970).

307990590961 is an frugal number, since it uses more digits than its factorization.

307990590961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109938 (or 554969 counting only the distinct ones).

The product of its (nonzero) digits is 4133430, while the sum is 58.

The spelling of 307990590961 in words is "three hundred seven billion, nine hundred ninety million, five hundred ninety thousand, nine hundred sixty-one".