52388639 has 2 divisors, whose sum is σ = 52388640. Its totient is φ = 52388638.

The previous prime is 52388621. The next prime is 52388647. The reversal of 52388639 is 93688325.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 52388639 - 2⁸ = 52388383 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52388639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52388659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26194319 + 26194320.

It is an arithmetic number, because the mean of its divisors is an integer number (26194320).

Almost surely, 2^52388639 is an apocalyptic number.

52388639 is a deficient number, since it is larger than the sum of its proper divisors (1).

52388639 is an equidigital number, since it uses as much as digits as its factorization.

52388639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 52388639 is about 7237.9996546007. Note that the first 3 decimals coincide. The cubic root of 52388639 is about 374.1786800992.

The spelling of 52388639 in words is "fifty-two million, three hundred eighty-eight thousand, six hundred thirty-nine".