63997355 has 8 divisors (see below), whose sum is σ = 77162064. Its totient is φ = 50954400.

The previous prime is 63997343. The next prime is 63997387. The reversal of 63997355 is 55379936.

63997355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 63997355 - 2⁸ = 63997099 is a prime.

It is a super-2 number, since 2×63997355² = 8191322893992050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29276 + ... + 31385.

It is an arithmetic number, because the mean of its divisors is an integer number (9645258).

Almost surely, 2^63997355 is an apocalyptic number.

63997355 is a deficient number, since it is larger than the sum of its proper divisors (13164709).

63997355 is a wasteful number, since it uses less digits than its factorization.

63997355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60877.

The product of its digits is 765450, while the sum is 47.

The square root of 63997355 is about 7999.8346857920. The cubic root of 63997355 is about 399.9944895074.

The spelling of 63997355 in words is "sixty-three million, nine hundred ninety-seven thousand, three hundred fifty-five".