399662096453 has 2 divisors, whose sum is σ = 399662096454. Its totient is φ = 399662096452.

The previous prime is 399662096389. The next prime is 399662096489. The reversal of 399662096453 is 354690266993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 390116415649 + 9545680804 = 624593^2 + 97702^2 .

It is a cyclic number.

It is not a de Polignac number, because 399662096453 - 2⁶ = 399662096389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399662096653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199831048226 + 199831048227.

It is an arithmetic number, because the mean of its divisors is an integer number (199831048227).

Almost surely, 2^399662096453 is an apocalyptic number.

It is an amenable number.

399662096453 is a deficient number, since it is larger than the sum of its proper divisors (1).

399662096453 is an equidigital number, since it uses as much as digits as its factorization.

399662096453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56687040, while the sum is 62.

The spelling of 399662096453 in words is "three hundred ninety-nine billion, six hundred sixty-two million, ninety-six thousand, four hundred fifty-three".