63997634 has 4 divisors (see below), whose sum is σ = 95996454. Its totient is φ = 31998816.

The previous prime is 63997621. The next prime is 63997649. The reversal of 63997634 is 43679936.

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., 35343025 + 28654609 = 5945^2 + 5353^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15999407 + ... + 15999410.

Almost surely, 2^63997634 is an apocalyptic number.

63997634 is a deficient number, since it is larger than the sum of its proper divisors (31998820).

63997634 is a wasteful number, since it uses less digits than its factorization.

63997634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31998819.

The product of its digits is 734832, while the sum is 47.

The square root of 63997634 is about 7999.8521236333. The cubic root of 63997634 is about 399.9950707726.

The spelling of 63997634 in words is "sixty-three million, nine hundred ninety-seven thousand, six hundred thirty-four".