639274299 has 8 divisors (see below), whose sum is σ = 852666192. Its totient is φ = 426032640.

The previous prime is 639274297. The next prime is 639274301. The reversal of 639274299 is 992472936.

639274299 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (639274297) and next prime (639274301).

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

It is not a de Polignac number, because 639274299 - 2¹ = 639274297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (639274297) 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, 27222 + ... + 44939.

It is an arithmetic number, because the mean of its divisors is an integer number (106583274).

Almost surely, 2^639274299 is an apocalyptic number.

639274299 is a deficient number, since it is larger than the sum of its proper divisors (213391893).

639274299 is a wasteful number, since it uses less digits than its factorization.

639274299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75117.

The product of its digits is 1469664, while the sum is 51.

The square root of 639274299 is about 25283.8742877748. The cubic root of 639274299 is about 861.4480287779.

The spelling of 639274299 in words is "six hundred thirty-nine million, two hundred seventy-four thousand, two hundred ninety-nine".