399908458501 has 2 divisors, whose sum is σ = 399908458502. Its totient is φ = 399908458500.

The previous prime is 399908458471. The next prime is 399908458513. The reversal of 399908458501 is 105854809993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377977810401 + 21930648100 = 614799^2 + 148090^2 .

It is a cyclic number.

It is not a de Polignac number, because 399908458501 - 2²⁷ = 399774240773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399908458501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399908458531) 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, 199954229250 + 199954229251.

It is an arithmetic number, because the mean of its divisors is an integer number (199954229251).

Almost surely, 2^399908458501 is an apocalyptic number.

It is an amenable number.

399908458501 is a deficient number, since it is larger than the sum of its proper divisors (1).

399908458501 is an equidigital number, since it uses as much as digits as its factorization.

399908458501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13996800, while the sum is 61.

The spelling of 399908458501 in words is "three hundred ninety-nine billion, nine hundred eight million, four hundred fifty-eight thousand, five hundred one".