63478639 has 16 divisors (see below), whose sum is σ = 76723200. Its totient is φ = 51305184.

The previous prime is 63478637. The next prime is 63478661. The reversal of 63478639 is 93687436.

It is not a de Polignac number, because 63478639 - 2¹ = 63478637 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 (63478637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30789 + ... + 32785.

It is an arithmetic number, because the mean of its divisors is an integer number (4795200).

Almost surely, 2^63478639 is an apocalyptic number.

63478639 is a deficient number, since it is larger than the sum of its proper divisors (13244561).

63478639 is a wasteful number, since it uses less digits than its factorization.

63478639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262.

The product of its digits is 653184, while the sum is 46.

The square root of 63478639 is about 7967.3483041725. The cubic root of 63478639 is about 398.9108684226.

The spelling of 63478639 in words is "sixty-three million, four hundred seventy-eight thousand, six hundred thirty-nine".