63998156 has 12 divisors (see below), whose sum is σ = 117891480. Its totient is φ = 30314880.

The previous prime is 63998153. The next prime is 63998159. The reversal of 63998156 is 65189936.

It is an interprime number because it is at equal distance from previous prime (63998153) and next prime (63998159).

It is a self number, because there is not a number n which added to its sum of digits gives 63998156.

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

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 in 3 ways as a sum of consecutive naturals, for example, 420965 + ... + 421116.

It is an arithmetic number, because the mean of its divisors is an integer number (9824290).

Almost surely, 2^63998156 is an apocalyptic number.

It is an amenable number.

63998156 is a deficient number, since it is larger than the sum of its proper divisors (53893324).

63998156 is a wasteful number, since it uses less digits than its factorization.

63998156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842104 (or 842102 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The square root of 63998156 is about 7999.8847491698. The cubic root of 63998156 is about 399.9961582964.

The spelling of 63998156 in words is "sixty-three million, nine hundred ninety-eight thousand, one hundred fifty-six".