63978494 has 8 divisors (see below), whose sum is σ = 96001680. Its totient is φ = 31977936.

The previous prime is 63978469. The next prime is 63978559. The reversal of 63978494 is 49487936.

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

It is a super-3 number, since 3×63978494³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8402 + ... + 14090.

It is an arithmetic number, because the mean of its divisors is an integer number (12000210).

Almost surely, 2^63978494 is an apocalyptic number.

63978494 is a deficient number, since it is larger than the sum of its proper divisors (32023186).

63978494 is a wasteful number, since it uses less digits than its factorization.

63978494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11314.

The product of its digits is 1306368, while the sum is 50.

The square root of 63978494 is about 7998.6557620640. The cubic root of 63978494 is about 399.9551908139.

The spelling of 63978494 in words is "sixty-three million, nine hundred seventy-eight thousand, four hundred ninety-four".