399246900929 has 2 divisors, whose sum is σ = 399246900930. Its totient is φ = 399246900928.

The previous prime is 399246900919. The next prime is 399246900937. The reversal of 399246900929 is 929009642993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397816548529 + 1430352400 = 630727^2 + 37820^2 .

It is a cyclic number.

It is not a de Polignac number, because 399246900929 - 2⁸ = 399246900673 is a prime.

It is not a weakly prime, because it can be changed into another prime (399246900919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199623450464 + 199623450465.

It is an arithmetic number, because the mean of its divisors is an integer number (199623450465).

Almost surely, 2^399246900929 is an apocalyptic number.

It is an amenable number.

399246900929 is a deficient number, since it is larger than the sum of its proper divisors (1).

399246900929 is an equidigital number, since it uses as much as digits as its factorization.

399246900929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17006112, while the sum is 62.

The spelling of 399246900929 in words is "three hundred ninety-nine billion, two hundred forty-six million, nine hundred thousand, nine hundred twenty-nine".