639342141 has 8 divisors (see below), whose sum is σ = 852669600. Its totient is φ = 426121392.

The previous prime is 639342139. The next prime is 639342157. The reversal of 639342141 is 141243936.

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

It is not a de Polignac number, because 639342141 - 2¹ = 639342139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639342101) 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, 11455 + ... + 37548.

It is an arithmetic number, because the mean of its divisors is an integer number (106583700).

Almost surely, 2^639342141 is an apocalyptic number.

It is an amenable number.

639342141 is a deficient number, since it is larger than the sum of its proper divisors (213327459).

639342141 is a wasteful number, since it uses less digits than its factorization.

639342141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53355.

The product of its digits is 15552, while the sum is 33.

The square root of 639342141 is about 25285.2158582837. The cubic root of 639342141 is about 861.4785009816.

The spelling of 639342141 in words is "six hundred thirty-nine million, three hundred forty-two thousand, one hundred forty-one".