63994415 has 16 divisors (see below), whose sum is σ = 77982528. Its totient is φ = 50409216.

The previous prime is 63994397. The next prime is 63994421. The reversal of 63994415 is 51449936.

63994415 is nontrivially palindromic in base 15.

It is a cyclic number.

It is not a de Polignac number, because 63994415 - 2¹² = 63990319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160997 + ... + 161393.

It is an arithmetic number, because the mean of its divisors is an integer number (4873908).

Almost surely, 2^63994415 is an apocalyptic number.

63994415 is a deficient number, since it is larger than the sum of its proper divisors (13988113).

63994415 is a wasteful number, since it uses less digits than its factorization.

63994415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its digits is 116640, while the sum is 41.

The square root of 63994415 is about 7999.6509298844. The cubic root of 63994415 is about 399.9883642449.

The spelling of 63994415 in words is "sixty-three million, nine hundred ninety-four thousand, four hundred fifteen".