811345901 has 2 divisors, whose sum is σ = 811345902. Its totient is φ = 811345900.

The previous prime is 811345877. The next prime is 811345939. The reversal of 811345901 is 109543118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681157801 + 130188100 = 26099^2 + 11410^2 .

It is a cyclic number.

It is not a de Polignac number, because 811345901 - 2⁶ = 811345837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811335901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405672950 + 405672951.

It is an arithmetic number, because the mean of its divisors is an integer number (405672951).

Almost surely, 2^811345901 is an apocalyptic number.

It is an amenable number.

811345901 is a deficient number, since it is larger than the sum of its proper divisors (1).

811345901 is an equidigital number, since it uses as much as digits as its factorization.

811345901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 811345901 is about 28484.1341978302. The cubic root of 811345901 is about 932.6857657588.

The spelling of 811345901 in words is "eight hundred eleven million, three hundred forty-five thousand, nine hundred one".