831373493 has 2 divisors, whose sum is σ = 831373494. Its totient is φ = 831373492.

The previous prime is 831373489. The next prime is 831373511. The reversal of 831373493 is 394373138.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 776346769 + 55026724 = 27863^2 + 7418^2 .

It is a cyclic number.

It is not a de Polignac number, because 831373493 - 2² = 831373489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 831373493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (831373463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415686746 + 415686747.

It is an arithmetic number, because the mean of its divisors is an integer number (415686747).

Almost surely, 2^831373493 is an apocalyptic number.

It is an amenable number.

831373493 is a deficient number, since it is larger than the sum of its proper divisors (1).

831373493 is an equidigital number, since it uses as much as digits as its factorization.

831373493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 41.

The square root of 831373493 is about 28833.5480473701. The cubic root of 831373493 is about 940.2977376592.

The spelling of 831373493 in words is "eight hundred thirty-one million, three hundred seventy-three thousand, four hundred ninety-three".