63489994 has 4 divisors (see below), whose sum is σ = 95234994. Its totient is φ = 31744996.

The previous prime is 63489989. The next prime is 63490027. The reversal of 63489994 is 49998436.

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., 55577025 + 7912969 = 7455^2 + 2813^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15872497 + ... + 15872500.

Almost surely, 2^63489994 is an apocalyptic number.

63489994 is a deficient number, since it is larger than the sum of its proper divisors (31745000).

63489994 is a wasteful number, since it uses less digits than its factorization.

63489994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31744999.

The product of its digits is 1679616, while the sum is 52.

The square root of 63489994 is about 7968.0608682414. The cubic root of 63489994 is about 398.9346526064.

The spelling of 63489994 in words is "sixty-three million, four hundred eighty-nine thousand, nine hundred ninety-four".