813850831 has 2 divisors, whose sum is σ = 813850832. Its totient is φ = 813850830.

The previous prime is 813850823. The next prime is 813850841. The reversal of 813850831 is 138058318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 813850831 - 2³ = 813850823 is a prime.

It is a super-2 number, since 2×813850831² = 1324706350238781122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813850801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406925415 + 406925416.

It is an arithmetic number, because the mean of its divisors is an integer number (406925416).

Almost surely, 2^813850831 is an apocalyptic number.

813850831 is a deficient number, since it is larger than the sum of its proper divisors (1).

813850831 is an equidigital number, since it uses as much as digits as its factorization.

813850831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 813850831 is about 28528.0709302259. The cubic root of 813850831 is about 933.6446302453.

The spelling of 813850831 in words is "eight hundred thirteen million, eight hundred fifty thousand, eight hundred thirty-one".