396913871 has 2 divisors, whose sum is σ = 396913872. Its totient is φ = 396913870.

The previous prime is 396913859. The next prime is 396913877. The reversal of 396913871 is 178319693.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396913871 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396913877) 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, 198456935 + 198456936.

It is an arithmetic number, because the mean of its divisors is an integer number (198456936).

Almost surely, 2^396913871 is an apocalyptic number.

396913871 is a deficient number, since it is larger than the sum of its proper divisors (1).

396913871 is an equidigital number, since it uses as much as digits as its factorization.

396913871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The square root of 396913871 is about 19922.6973826337. The cubic root of 396913871 is about 734.9065060710.

The spelling of 396913871 in words is "three hundred ninety-six million, nine hundred thirteen thousand, eight hundred seventy-one".