639896601 has 8 divisors (see below), whose sum is σ = 854589760. Its totient is φ = 425900592.

The previous prime is 639896597. The next prime is 639896623. The reversal of 639896601 is 106698936.

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

It is not a de Polignac number, because 639896601 - 2² = 639896597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639891601) 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, 172141 + ... + 175818.

It is an arithmetic number, because the mean of its divisors is an integer number (106823720).

Almost surely, 2^639896601 is an apocalyptic number.

It is an amenable number.

639896601 is a deficient number, since it is larger than the sum of its proper divisors (214693159).

639896601 is a wasteful number, since it uses less digits than its factorization.

639896601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348575.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 639896601 is about 25296.1775966251. The cubic root of 639896601 is about 861.7274638481.

The spelling of 639896601 in words is "six hundred thirty-nine million, eight hundred ninety-six thousand, six hundred one".