63861959 has 4 divisors (see below), whose sum is σ = 72985104. Its totient is φ = 54738816.

The previous prime is 63861947. The next prime is 63861971. The reversal of 63861959 is 95916836.

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

It is an interprime number because it is at equal distance from previous prime (63861947) and next prime (63861971).

It is a cyclic number.

It is not a de Polignac number, because 63861959 - 2¹² = 63857863 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 (63861989) 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, 4561562 + ... + 4561575.

It is an arithmetic number, because the mean of its divisors is an integer number (18246276).

Almost surely, 2^63861959 is an apocalyptic number.

63861959 is a deficient number, since it is larger than the sum of its proper divisors (9123145).

63861959 is an equidigital number, since it uses as much as digits as its factorization.

63861959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9123144.

The product of its digits is 349920, while the sum is 47.

The square root of 63861959 is about 7991.3677802989. The cubic root of 63861959 is about 399.7122075718.

The spelling of 63861959 in words is "sixty-three million, eight hundred sixty-one thousand, nine hundred fifty-nine".