63642279 has 8 divisors (see below), whose sum is σ = 86829952. Its totient is φ = 41441400.

The previous prime is 63642259. The next prime is 63642281. The reversal of 63642279 is 97224636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63642279 - 2⁵ = 63642247 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 (63642239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246547 + ... + 246804.

It is an arithmetic number, because the mean of its divisors is an integer number (10853744).

Almost surely, 2^63642279 is an apocalyptic number.

63642279 is a deficient number, since it is larger than the sum of its proper divisors (23187673).

63642279 is a wasteful number, since it uses less digits than its factorization.

63642279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493397.

The product of its digits is 108864, while the sum is 39.

The square root of 63642279 is about 7977.6111085964. The cubic root of 63642279 is about 399.2533550873.

The spelling of 63642279 in words is "sixty-three million, six hundred forty-two thousand, two hundred seventy-nine".