831193457 has 4 divisors (see below), whose sum is σ = 841207920. Its totient is φ = 821178996.

The previous prime is 831193453. The next prime is 831193459. The reversal of 831193457 is 754391138.

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 831193457 - 2² = 831193453 is a prime.

It is a super-2 number, since 2×831193457² = 1381765125919221698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831193453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5007107 + ... + 5007272.

It is an arithmetic number, because the mean of its divisors is an integer number (210301980).

Almost surely, 2^831193457 is an apocalyptic number.

It is an amenable number.

831193457 is a deficient number, since it is larger than the sum of its proper divisors (10014463).

831193457 is a wasteful number, since it uses less digits than its factorization.

831193457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10014462.

The product of its digits is 90720, while the sum is 41.

The square root of 831193457 is about 28830.4258900211. The cubic root of 831193457 is about 940.2298581537.

The spelling of 831193457 in words is "eight hundred thirty-one million, one hundred ninety-three thousand, four hundred fifty-seven".