399274023 has 4 divisors (see below), whose sum is σ = 532365368. Its totient is φ = 266182680.

The previous prime is 399274013. The next prime is 399274061. The reversal of 399274023 is 320472993.

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

It is not a de Polignac number, because 399274023 - 2²² = 395079719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399274003) 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, 66545668 + ... + 66545673.

It is an arithmetic number, because the mean of its divisors is an integer number (133091342).

Almost surely, 2^399274023 is an apocalyptic number.

399274023 is a deficient number, since it is larger than the sum of its proper divisors (133091345).

399274023 is a wasteful number, since it uses less digits than its factorization.

399274023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133091344.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 399274023 is about 19981.8423324778. The cubic root of 399274023 is about 736.3602760942.

The spelling of 399274023 in words is "three hundred ninety-nine million, two hundred seventy-four thousand, twenty-three".