813745031 has 8 divisors (see below), whose sum is σ = 898418304. Its totient is φ = 730854520.

The previous prime is 813745027. The next prime is 813745061. The reversal of 813745031 is 130547318.

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

It is not a de Polignac number, because 813745031 - 2² = 813745027 is a prime.

It is a super-2 number, since 2×813745031² = 1324361950954381922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813745021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444731 + ... + 446556.

It is an arithmetic number, because the mean of its divisors is an integer number (112302288).

Almost surely, 2^813745031 is an apocalyptic number.

813745031 is a deficient number, since it is larger than the sum of its proper divisors (84673273).

813745031 is a wasteful number, since it uses less digits than its factorization.

813745031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891381.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 813745031 is about 28526.2165560034. The cubic root of 813745031 is about 933.6041707906.

The spelling of 813745031 in words is "eight hundred thirteen million, seven hundred forty-five thousand, thirty-one".