399214243 has 4 divisors (see below), whose sum is σ = 416571408. Its totient is φ = 381857080.

The previous prime is 399214241. The next prime is 399214271. The reversal of 399214243 is 342412993.

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 399214243 - 2¹ = 399214241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399214241) 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, 8678548 + ... + 8678593.

It is an arithmetic number, because the mean of its divisors is an integer number (104142852).

Almost surely, 2^399214243 is an apocalyptic number.

399214243 is a deficient number, since it is larger than the sum of its proper divisors (17357165).

399214243 is a wasteful number, since it uses less digits than its factorization.

399214243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17357164.

The product of its digits is 46656, while the sum is 37.

The square root of 399214243 is about 19980.3464184183. The cubic root of 399214243 is about 736.3235245469.

The spelling of 399214243 in words is "three hundred ninety-nine million, two hundred fourteen thousand, two hundred forty-three".