399766362287 has 2 divisors, whose sum is σ = 399766362288. Its totient is φ = 399766362286.

The previous prime is 399766362251. The next prime is 399766362311. The reversal of 399766362287 is 782263667993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399766362287 - 2⁶ = 399766362223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399766362187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199883181143 + 199883181144.

It is an arithmetic number, because the mean of its divisors is an integer number (199883181144).

Almost surely, 2^399766362287 is an apocalyptic number.

399766362287 is a deficient number, since it is larger than the sum of its proper divisors (1).

399766362287 is an equidigital number, since it uses as much as digits as its factorization.

399766362287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246903552, while the sum is 68.

The spelling of 399766362287 in words is "three hundred ninety-nine billion, seven hundred sixty-six million, three hundred sixty-two thousand, two hundred eighty-seven".