63863791 has 2 divisors, whose sum is σ = 63863792. Its totient is φ = 63863790.

The previous prime is 63863759. The next prime is 63863803. The reversal of 63863791 is 19736836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63863791 - 2⁵ = 63863759 is a prime.

It is equal to p_3777469 and since 63863791 and 3777469 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63860791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31931895 + 31931896.

It is an arithmetic number, because the mean of its divisors is an integer number (31931896).

Almost surely, 2^63863791 is an apocalyptic number.

63863791 is a deficient number, since it is larger than the sum of its proper divisors (1).

63863791 is an equidigital number, since it uses as much as digits as its factorization.

63863791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 63863791 is about 7991.4824031590. The cubic root of 63863791 is about 399.7160296999.

The spelling of 63863791 in words is "sixty-three million, eight hundred sixty-three thousand, seven hundred ninety-one".