63436391 has 2 divisors, whose sum is σ = 63436392. Its totient is φ = 63436390.

The previous prime is 63436379. The next prime is 63436397. The reversal of 63436391 is 19363436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63436391 - 2⁶ = 63436327 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63436397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31718195 + 31718196.

It is an arithmetic number, because the mean of its divisors is an integer number (31718196).

Almost surely, 2^63436391 is an apocalyptic number.

63436391 is a deficient number, since it is larger than the sum of its proper divisors (1).

63436391 is an equidigital number, since it uses as much as digits as its factorization.

63436391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 35.

The square root of 63436391 is about 7964.6965416141. The cubic root of 63436391 is about 398.8223508421.

The spelling of 63436391 in words is "sixty-three million, four hundred thirty-six thousand, three hundred ninety-one".