63501913 has 2 divisors, whose sum is σ = 63501914. Its totient is φ = 63501912.

The previous prime is 63501901. The next prime is 63501937. The reversal of 63501913 is 31910536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56595529 + 6906384 = 7523^2 + 2628^2 .

It is a cyclic number.

It is not a de Polignac number, because 63501913 - 2⁵ = 63501881 is a prime.

It is not a weakly prime, because it can be changed into another prime (63501943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31750956 + 31750957.

It is an arithmetic number, because the mean of its divisors is an integer number (31750957).

Almost surely, 2^63501913 is an apocalyptic number.

It is an amenable number.

63501913 is a deficient number, since it is larger than the sum of its proper divisors (1).

63501913 is an equidigital number, since it uses as much as digits as its factorization.

63501913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 63501913 is about 7968.8087566461. The cubic root of 63501913 is about 398.9596150942.

The spelling of 63501913 in words is "sixty-three million, five hundred one thousand, nine hundred thirteen".