63931478 has 8 divisors (see below), whose sum is σ = 103273968. Its totient is φ = 29506824.

The previous prime is 63931471. The next prime is 63931481. The reversal of 63931478 is 87413936.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63931471) 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, 1229426 + ... + 1229477.

It is an arithmetic number, because the mean of its divisors is an integer number (12909246).

Almost surely, 2^63931478 is an apocalyptic number.

63931478 is a deficient number, since it is larger than the sum of its proper divisors (39342490).

63931478 is a wasteful number, since it uses less digits than its factorization.

63931478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458918.

The product of its digits is 108864, while the sum is 41.

The square root of 63931478 is about 7995.7162280811. The cubic root of 63931478 is about 399.8571948561.

The spelling of 63931478 in words is "sixty-three million, nine hundred thirty-one thousand, four hundred seventy-eight".