63571901 has 2 divisors, whose sum is σ = 63571902. Its totient is φ = 63571900.

The previous prime is 63571897. The next prime is 63571903. The reversal of 63571901 is 10917536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61246276 + 2325625 = 7826^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 63571901 - 2² = 63571897 is a prime.

Together with 63571903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63571903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31785950 + 31785951.

It is an arithmetic number, because the mean of its divisors is an integer number (31785951).

Almost surely, 2^63571901 is an apocalyptic number.

It is an amenable number.

63571901 is a deficient number, since it is larger than the sum of its proper divisors (1).

63571901 is an equidigital number, since it uses as much as digits as its factorization.

63571901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 63571901 is about 7973.1989188782. The cubic root of 63571901 is about 399.1061310671.

The spelling of 63571901 in words is "sixty-three million, five hundred seventy-one thousand, nine hundred one".