399340702823 has 2 divisors, whose sum is σ = 399340702824. Its totient is φ = 399340702822.

The previous prime is 399340702763. The next prime is 399340702897. The reversal of 399340702823 is 328207043993.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399340702823 - 2⁸ = 399340702567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399340704823) 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, 199670351411 + 199670351412.

It is an arithmetic number, because the mean of its divisors is an integer number (199670351412).

Almost surely, 2^399340702823 is an apocalyptic number.

399340702823 is a deficient number, since it is larger than the sum of its proper divisors (1).

399340702823 is an equidigital number, since it uses as much as digits as its factorization.

399340702823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 399340702823 in words is "three hundred ninety-nine billion, three hundred forty million, seven hundred two thousand, eight hundred twenty-three".