399679220529 has 12 divisors (see below), whose sum is σ = 577564271232. Its totient is φ = 266337502200.

The previous prime is 399679220527. The next prime is 399679220533. The reversal of 399679220529 is 925022976993.

399679220529 is a `hidden beast` number, since 39 + 9 + 6 + 79 + 2 + 2 + 0 + 529 = 666.

It is not a de Polignac number, because 399679220529 - 2¹ = 399679220527 is a prime.

It is a super-4 number, since 4×399679220529⁴ (a number of 48 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (399679220527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9587337 + ... + 9628934.

It is an arithmetic number, because the mean of its divisors is an integer number (48130355936).

Almost surely, 2^399679220529 is an apocalyptic number.

It is an amenable number.

399679220529 is a deficient number, since it is larger than the sum of its proper divisors (177885050703).

399679220529 is a wasteful number, since it uses less digits than its factorization.

399679220529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19218588 (or 19218585 counting only the distinct ones).

The product of its (nonzero) digits is 33067440, while the sum is 63.

The spelling of 399679220529 in words is "three hundred ninety-nine billion, six hundred seventy-nine million, two hundred twenty thousand, five hundred twenty-nine".