639157303 has 4 divisors (see below), whose sum is σ = 661197240. Its totient is φ = 617117368.

The previous prime is 639157301. The next prime is 639157307. The reversal of 639157303 is 303751936.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 639157303 - 2¹ = 639157301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639157301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11019925 + ... + 11019982.

It is an arithmetic number, because the mean of its divisors is an integer number (165299310).

Almost surely, 2^639157303 is an apocalyptic number.

639157303 is a deficient number, since it is larger than the sum of its proper divisors (22039937).

639157303 is a wasteful number, since it uses less digits than its factorization.

639157303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22039936.

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

The square root of 639157303 is about 25281.5605333215. The cubic root of 639157303 is about 861.3954732876.

The spelling of 639157303 in words is "six hundred thirty-nine million, one hundred fifty-seven thousand, three hundred three".