63998157 has 16 divisors (see below), whose sum is σ = 88640640. Its totient is φ = 41022912.

The previous prime is 63998153. The next prime is 63998159. The reversal of 63998157 is 75189936.

It is not a de Polignac number, because 63998157 - 2² = 63998153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63998153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21483 + ... + 24279.

It is an arithmetic number, because the mean of its divisors is an integer number (5540040).

Almost surely, 2^63998157 is an apocalyptic number.

It is an amenable number.

63998157 is a deficient number, since it is larger than the sum of its proper divisors (24642483).

63998157 is a wasteful number, since it uses less digits than its factorization.

63998157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3092.

The product of its digits is 408240, while the sum is 48.

The square root of 63998157 is about 7999.8848116707. The cubic root of 63998157 is about 399.9961603798.

The spelling of 63998157 in words is "sixty-three million, nine hundred ninety-eight thousand, one hundred fifty-seven".