399673610369 has 8 divisors (see below), whose sum is σ = 439610944800. Its totient is φ = 363339644580.

The previous prime is 399673610327. The next prime is 399673610393. The reversal of 399673610369 is 963016376993.

It is not a de Polignac number, because 399673610369 - 2²⁸ = 399405174913 is a prime.

It is a super-2 number, since 2×399673610369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399673610669) 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 in 7 ways as a sum of consecutive naturals, for example, 150139019 + ... + 150141680.

It is an arithmetic number, because the mean of its divisors is an integer number (54951368100).

Almost surely, 2^399673610369 is an apocalyptic number.

It is an amenable number.

399673610369 is a deficient number, since it is larger than the sum of its proper divisors (39937334431).

399673610369 is an equidigital number, since it uses as much as digits as its factorization.

399673610369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300280732 (or 300280710 counting only the distinct ones).

The product of its (nonzero) digits is 29760696, while the sum is 62.

The spelling of 399673610369 in words is "three hundred ninety-nine billion, six hundred seventy-three million, six hundred ten thousand, three hundred sixty-nine".