831307961 has 4 divisors (see below), whose sum is σ = 906881424. Its totient is φ = 755734500.

The previous prime is 831307957. The next prime is 831307963. The reversal of 831307961 is 169703138.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 831307961 - 2² = 831307957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831307963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37786715 + ... + 37786736.

It is an arithmetic number, because the mean of its divisors is an integer number (226720356).

Almost surely, 2^831307961 is an apocalyptic number.

It is an amenable number.

831307961 is a deficient number, since it is larger than the sum of its proper divisors (75573463).

831307961 is a wasteful number, since it uses less digits than its factorization.

831307961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75573462.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 831307961 is about 28832.4116403744. The cubic root of 831307961 is about 940.2730310699.

The spelling of 831307961 in words is "eight hundred thirty-one million, three hundred seven thousand, nine hundred sixty-one".