813850431 has 4 divisors (see below), whose sum is σ = 1085133912. Its totient is φ = 542566952.

The previous prime is 813850399. The next prime is 813850459. The reversal of 813850431 is 134058318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 813850431 - 2⁵ = 813850399 is a prime.

It is a super-2 number, since 2×813850431² = 1324705048077771522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813850392 and 813850401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813850481) 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, 135641736 + ... + 135641741.

It is an arithmetic number, because the mean of its divisors is an integer number (271283478).

Almost surely, 2^813850431 is an apocalyptic number.

813850431 is a deficient number, since it is larger than the sum of its proper divisors (271283481).

813850431 is a wasteful number, since it uses less digits than its factorization.

813850431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271283480.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 813850431 is about 28528.0639195863. The cubic root of 813850431 is about 933.6444772861.

The spelling of 813850431 in words is "eight hundred thirteen million, eight hundred fifty thousand, four hundred thirty-one".