63315779 has 2 divisors, whose sum is σ = 63315780. Its totient is φ = 63315778.

The previous prime is 63315739. The next prime is 63315781. The reversal of 63315779 is 97751336.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63315779 - 2²⁰ = 62267203 is a prime.

Together with 63315781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63315719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31657889 + 31657890.

It is an arithmetic number, because the mean of its divisors is an integer number (31657890).

Almost surely, 2^63315779 is an apocalyptic number.

63315779 is a deficient number, since it is larger than the sum of its proper divisors (1).

63315779 is an equidigital number, since it uses as much as digits as its factorization.

63315779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119070, while the sum is 41.

The square root of 63315779 is about 7957.1212759389. The cubic root of 63315779 is about 398.5694293518.

The spelling of 63315779 in words is "sixty-three million, three hundred fifteen thousand, seven hundred seventy-nine".