396999013 has 2 divisors, whose sum is σ = 396999014. Its totient is φ = 396999012.

The previous prime is 396998999. The next prime is 396999019. The reversal of 396999013 is 310999693.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299739969 + 97259044 = 17313^2 + 9862^2 .

It is a cyclic number.

It is not a de Polignac number, because 396999013 - 2¹³ = 396990821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396999019) 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, 198499506 + 198499507.

It is an arithmetic number, because the mean of its divisors is an integer number (198499507).

Almost surely, 2^396999013 is an apocalyptic number.

It is an amenable number.

396999013 is a deficient number, since it is larger than the sum of its proper divisors (1).

396999013 is an equidigital number, since it uses as much as digits as its factorization.

396999013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 354294, while the sum is 49.

The square root of 396999013 is about 19924.8340771009. The cubic root of 396999013 is about 734.9590505824.

The spelling of 396999013 in words is "three hundred ninety-six million, nine hundred ninety-nine thousand, thirteen".