813952379 has 2 divisors, whose sum is σ = 813952380. Its totient is φ = 813952378.

The previous prime is 813952357. The next prime is 813952411. The reversal of 813952379 is 973259318.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813952379 is a prime.

It is not a weakly prime, because it can be changed into another prime (813952339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406976189 + 406976190.

It is an arithmetic number, because the mean of its divisors is an integer number (406976190).

Almost surely, 2^813952379 is an apocalyptic number.

813952379 is a deficient number, since it is larger than the sum of its proper divisors (1).

813952379 is an equidigital number, since it uses as much as digits as its factorization.

813952379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 813952379 is about 28529.8506655748. The cubic root of 813952379 is about 933.6834603758.

The spelling of 813952379 in words is "eight hundred thirteen million, nine hundred fifty-two thousand, three hundred seventy-nine".