399326867 has 4 divisors (see below), whose sum is σ = 400738200. Its totient is φ = 397915536.

The previous prime is 399326833. The next prime is 399326869. The reversal of 399326867 is 768623993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 399326867 - 2⁶ = 399326803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399326869) 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, 705242 + ... + 705807.

It is an arithmetic number, because the mean of its divisors is an integer number (100184550).

Almost surely, 2^399326867 is an apocalyptic number.

399326867 is a deficient number, since it is larger than the sum of its proper divisors (1411333).

399326867 is a wasteful number, since it uses less digits than its factorization.

399326867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411332.

The product of its digits is 2939328, while the sum is 53.

The square root of 399326867 is about 19983.1645892236. The cubic root of 399326867 is about 736.3927604730.

The spelling of 399326867 in words is "three hundred ninety-nine million, three hundred twenty-six thousand, eight hundred sixty-seven".