813901033 has 16 divisors (see below), whose sum is σ = 909950976. Its totient is φ = 721581840.

The previous prime is 813900961. The next prime is 813901051. The reversal of 813901033 is 330109318.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813901033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 813900992 and 813901010.

It is not an unprimeable number, because it can be changed into a prime (813901093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513360 + ... + 514942.

It is an arithmetic number, because the mean of its divisors is an integer number (56871936).

Almost surely, 2^813901033 is an apocalyptic number.

It is an amenable number.

813901033 is a deficient number, since it is larger than the sum of its proper divisors (96049943).

813901033 is a wasteful number, since it uses less digits than its factorization.

813901033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2724.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 813901033 is about 28528.9507868761. The cubic root of 813901033 is about 933.6638269917.

The spelling of 813901033 in words is "eight hundred thirteen million, nine hundred one thousand, thirty-three".