639792001 has 4 divisors (see below), whose sum is σ = 640104192. Its totient is φ = 639479812.

The previous prime is 639791963. The next prime is 639792029. The reversal of 639792001 is 100297936.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 639792001 - 2⁹ = 639791489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639792071) 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, 153001 + ... + 157126.

It is an arithmetic number, because the mean of its divisors is an integer number (160026048).

Almost surely, 2^639792001 is an apocalyptic number.

It is an amenable number.

639792001 is a deficient number, since it is larger than the sum of its proper divisors (312191).

639792001 is a wasteful number, since it uses less digits than its factorization.

639792001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312190.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 639792001 is about 25294.1100060864. The cubic root of 639792001 is about 861.6805075094.

The spelling of 639792001 in words is "six hundred thirty-nine million, seven hundred ninety-two thousand, one".