399014439 has 4 divisors (see below), whose sum is σ = 532019256. Its totient is φ = 266009624.

The previous prime is 399014437. The next prime is 399014461. The reversal of 399014439 is 934410993.

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 399014439 - 2¹ = 399014437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399014439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399014437) 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, 66502404 + ... + 66502409.

It is an arithmetic number, because the mean of its divisors is an integer number (133004814).

Almost surely, 2^399014439 is an apocalyptic number.

399014439 is a deficient number, since it is larger than the sum of its proper divisors (133004817).

399014439 is a wasteful number, since it uses less digits than its factorization.

399014439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133004816.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 399014439 is about 19975.3457792350. The cubic root of 399014439 is about 736.2006624170.

The spelling of 399014439 in words is "three hundred ninety-nine million, fourteen thousand, four hundred thirty-nine".