813774631 has 2 divisors, whose sum is σ = 813774632. Its totient is φ = 813774630.

The previous prime is 813774607. The next prime is 813774653. The reversal of 813774631 is 136477318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 813774631 - 2²⁹ = 276903719 is a prime.

It is a super-2 number, since 2×813774631² = 1324458300118372322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813774691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406887315 + 406887316.

It is an arithmetic number, because the mean of its divisors is an integer number (406887316).

Almost surely, 2^813774631 is an apocalyptic number.

813774631 is a deficient number, since it is larger than the sum of its proper divisors (1).

813774631 is an equidigital number, since it uses as much as digits as its factorization.

813774631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 813774631 is about 28526.7353722784. The cubic root of 813774631 is about 933.6154906133.

The spelling of 813774631 in words is "eight hundred thirteen million, seven hundred seventy-four thousand, six hundred thirty-one".