831390137 has 8 divisors (see below), whose sum is σ = 835336320. Its totient is φ = 827452080.

The previous prime is 831390127. The next prime is 831390143. The reversal of 831390137 is 731093138.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 831390137 - 2⁶ = 831390073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 831390097 and 831390106.

It is not an unprimeable number, because it can be changed into a prime (831390127) 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 7 ways as a sum of consecutive naturals, for example, 303062 + ... + 305792.

It is an arithmetic number, because the mean of its divisors is an integer number (104417040).

Almost surely, 2^831390137 is an apocalyptic number.

It is an amenable number.

831390137 is a deficient number, since it is larger than the sum of its proper divisors (3946183).

831390137 is a wasteful number, since it uses less digits than its factorization.

831390137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 831390137 is about 28833.8366680537. The cubic root of 831390137 is about 940.3040125009.

The spelling of 831390137 in words is "eight hundred thirty-one million, three hundred ninety thousand, one hundred thirty-seven".