63872639 has 2 divisors, whose sum is σ = 63872640. Its totient is φ = 63872638.

The previous prime is 63872609. The next prime is 63872651. The reversal of 63872639 is 93627836.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63872639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63872639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63872609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31936319 + 31936320.

It is an arithmetic number, because the mean of its divisors is an integer number (31936320).

Almost surely, 2^63872639 is an apocalyptic number.

63872639 is a deficient number, since it is larger than the sum of its proper divisors (1).

63872639 is an equidigital number, since it uses as much as digits as its factorization.

63872639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The square root of 63872639 is about 7992.0359733925. The cubic root of 63872639 is about 399.7344883813.

The spelling of 63872639 in words is "sixty-three million, eight hundred seventy-two thousand, six hundred thirty-nine".