638592053 has 4 divisors (see below), whose sum is σ = 696645888. Its totient is φ = 580538220.

The previous prime is 638592049. The next prime is 638592061. The reversal of 638592053 is 350295836.

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 638592053 - 2² = 638592049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 638592053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638592013) 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, 29026901 + ... + 29026922.

It is an arithmetic number, because the mean of its divisors is an integer number (174161472).

Almost surely, 2^638592053 is an apocalyptic number.

It is an amenable number.

638592053 is a deficient number, since it is larger than the sum of its proper divisors (58053835).

638592053 is a wasteful number, since it uses less digits than its factorization.

638592053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58053834.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 638592053 is about 25270.3789643131. The cubic root of 638592053 is about 861.1414683171.

The spelling of 638592053 in words is "six hundred thirty-eight million, five hundred ninety-two thousand, fifty-three".