639703153 has 4 divisors (see below), whose sum is σ = 673371760. Its totient is φ = 606034548.

The previous prime is 639703151. The next prime is 639703187. The reversal of 639703153 is 351307936.

It is a happy number.

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 639703153 - 2¹ = 639703151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639703151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16834275 + ... + 16834312.

It is an arithmetic number, because the mean of its divisors is an integer number (168342940).

Almost surely, 2^639703153 is an apocalyptic number.

It is an amenable number.

639703153 is a deficient number, since it is larger than the sum of its proper divisors (33668607).

639703153 is a wasteful number, since it uses less digits than its factorization.

639703153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33668606.

The product of its (nonzero) digits is 51030, while the sum is 37.

The square root of 639703153 is about 25292.3536469029. The cubic root of 639703153 is about 861.6406184341.

The spelling of 639703153 in words is "six hundred thirty-nine million, seven hundred three thousand, one hundred fifty-three".