399168675 has 36 divisors (see below), whose sum is σ = 734242440. Its totient is φ = 212613120.

The previous prime is 399168641. The next prime is 399168709. The reversal of 399168675 is 576861993.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (399168641) and next prime (399168709).

It is not a de Polignac number, because 399168675 - 2¹¹ = 399166627 is a prime.

It is a super-2 number, since 2×399168675² = 318671262202511250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 518691 + ... + 519459.

Almost surely, 2^399168675 is an apocalyptic number.

399168675 is a deficient number, since it is larger than the sum of its proper divisors (335073765).

399168675 is an frugal number, since it uses more digits than its factorization.

399168675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 777 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 399168675 is about 19979.2060653070. The cubic root of 399168675 is about 736.2955077885.

The spelling of 399168675 in words is "three hundred ninety-nine million, one hundred sixty-eight thousand, six hundred seventy-five".