63998801 has 2 divisors, whose sum is σ = 63998802. Its totient is φ = 63998800.

The previous prime is 63998777. The next prime is 63998807. The reversal of 63998801 is 10889936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39753025 + 24245776 = 6305^2 + 4924^2 .

It is a cyclic number.

It is not a de Polignac number, because 63998801 - 2²² = 59804497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63998807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31999400 + 31999401.

It is an arithmetic number, because the mean of its divisors is an integer number (31999401).

Almost surely, 2^63998801 is an apocalyptic number.

It is an amenable number.

63998801 is a deficient number, since it is larger than the sum of its proper divisors (1).

63998801 is an equidigital number, since it uses as much as digits as its factorization.

63998801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 63998801 is about 7999.9250621490. The cubic root of 63998801 is about 399.9975020677.

The spelling of 63998801 in words is "sixty-three million, nine hundred ninety-eight thousand, eight hundred one".