63879769 has 2 divisors, whose sum is σ = 63879770. Its totient is φ = 63879768.

The previous prime is 63879737. The next prime is 63879791. The reversal of 63879769 is 96797836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58982400 + 4897369 = 7680^2 + 2213^2 .

It is a cyclic number.

It is not a de Polignac number, because 63879769 - 2⁵ = 63879737 is a prime.

It is a super-2 number, since 2×63879769² = 8161249774986722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63879709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31939884 + 31939885.

It is an arithmetic number, because the mean of its divisors is an integer number (31939885).

Almost surely, 2^63879769 is an apocalyptic number.

It is an amenable number.

63879769 is a deficient number, since it is larger than the sum of its proper divisors (1).

63879769 is an equidigital number, since it uses as much as digits as its factorization.

63879769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 55.

The square root of 63879769 is about 7992.4820300079. The cubic root of 63879769 is about 399.7493617340.

The spelling of 63879769 in words is "sixty-three million, eight hundred seventy-nine thousand, seven hundred sixty-nine".