63976669 has 2 divisors, whose sum is σ = 63976670. Its totient is φ = 63976668.

The previous prime is 63976621. The next prime is 63976723. The reversal of 63976669 is 96667936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63920025 + 56644 = 7995^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 63976669 - 2²³ = 55588061 is a prime.

It is a super-2 number, since 2×63976669² = 8186028352671122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63976469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31988334 + 31988335.

It is an arithmetic number, because the mean of its divisors is an integer number (31988335).

Almost surely, 2^63976669 is an apocalyptic number.

It is an amenable number.

63976669 is a deficient number, since it is larger than the sum of its proper divisors (1).

63976669 is an equidigital number, since it uses as much as digits as its factorization.

63976669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 52.

The square root of 63976669 is about 7998.5416795813. The cubic root of 63976669 is about 399.9513878424.

The spelling of 63976669 in words is "sixty-three million, nine hundred seventy-six thousand, six hundred sixty-nine".