63917923 has 2 divisors, whose sum is σ = 63917924. Its totient is φ = 63917922.

The previous prime is 63917869. The next prime is 63917941. The reversal of 63917923 is 32971936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63917923 - 2⁹ = 63917411 is a prime.

It is not a weakly prime, because it can be changed into another prime (63917983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31958961 + 31958962.

It is an arithmetic number, because the mean of its divisors is an integer number (31958962).

Almost surely, 2^63917923 is an apocalyptic number.

63917923 is a deficient number, since it is larger than the sum of its proper divisors (1).

63917923 is an equidigital number, since it uses as much as digits as its factorization.

63917923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 40.

The square root of 63917923 is about 7994.8685417585. The cubic root of 63917923 is about 399.8289331007.

The spelling of 63917923 in words is "sixty-three million, nine hundred seventeen thousand, nine hundred twenty-three".