399027916933969 has 4 divisors (see below), whose sum is σ = 399040509761344. Its totient is φ = 399015324106596.

The previous prime is 399027916933949. The next prime is 399027916934047. The reversal of 399027916933969 is 969339619720993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399027916933969 is a prime.

It is a super-2 number, since 2×399027916933969² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399027916933949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6296366157 + ... + 6296429530.

It is an arithmetic number, because the mean of its divisors is an integer number (99760127440336).

Almost surely, 2^{399027916933969} is an apocalyptic number.

It is an amenable number.

399027916933969 is a deficient number, since it is larger than the sum of its proper divisors (12592827375).

399027916933969 is a wasteful number, since it uses less digits than its factorization.

399027916933969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12592827374.

The product of its (nonzero) digits is 7231849128, while the sum is 85.

The spelling of 399027916933969 in words is "three hundred ninety-nine trillion, twenty-seven billion, nine hundred sixteen million, nine hundred thirty-three thousand, nine hundred sixty-nine".