399892150997 has 2 divisors, whose sum is σ = 399892150998. Its totient is φ = 399892150996.

The previous prime is 399892150981. The next prime is 399892151027. The reversal of 399892150997 is 799051298993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385807445956 + 14084705041 = 621134^2 + 118679^2 .

It is a cyclic number.

It is not a de Polignac number, because 399892150997 - 2⁴ = 399892150981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399892150997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399892150597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199946075498 + 199946075499.

It is an arithmetic number, because the mean of its divisors is an integer number (199946075499).

Almost surely, 2^399892150997 is an apocalyptic number.

It is an amenable number.

399892150997 is a deficient number, since it is larger than the sum of its proper divisors (1).

399892150997 is an equidigital number, since it uses as much as digits as its factorization.

399892150997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 99202320, while the sum is 71.

The spelling of 399892150997 in words is "three hundred ninety-nine billion, eight hundred ninety-two million, one hundred fifty thousand, nine hundred ninety-seven".