63989738 has 4 divisors (see below), whose sum is σ = 95984610. Its totient is φ = 31994868.

The previous prime is 63989693. The next prime is 63989743. The reversal of 63989738 is 83798936.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54361129 + 9628609 = 7373^2 + 3103^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63989738.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15997433 + ... + 15997436.

Almost surely, 2^63989738 is an apocalyptic number.

63989738 is a deficient number, since it is larger than the sum of its proper divisors (31994872).

63989738 is a wasteful number, since it uses less digits than its factorization.

63989738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31994871.

The product of its digits is 1959552, while the sum is 53.

The square root of 63989738 is about 7999.3585992878. The cubic root of 63989738 is about 399.9786196906.

The spelling of 63989738 in words is "sixty-three million, nine hundred eighty-nine thousand, seven hundred thirty-eight".