399534499 has 8 divisors (see below), whose sum is σ = 491734880. Its totient is φ = 316115136.

The previous prime is 399534461. The next prime is 399534503. The reversal of 399534499 is 994435993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399534499 - 2²⁵ = 365980067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399534899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2195154 + ... + 2195335.

It is an arithmetic number, because the mean of its divisors is an integer number (61466860).

Almost surely, 2^399534499 is an apocalyptic number.

399534499 is a deficient number, since it is larger than the sum of its proper divisors (92200381).

399534499 is a wasteful number, since it uses less digits than its factorization.

399534499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4390509.

The product of its digits is 4723920, while the sum is 55.

The square root of 399534499 is about 19988.3590872287. The cubic root of 399534499 is about 736.5203687240.

The spelling of 399534499 in words is "three hundred ninety-nine million, five hundred thirty-four thousand, four hundred ninety-nine".