63669701 has 2 divisors, whose sum is σ = 63669702. Its totient is φ = 63669700.

The previous prime is 63669677. The next prime is 63669707. The reversal of 63669701 is 10796636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53436100 + 10233601 = 7310^2 + 3199^2 .

It is a cyclic number.

It is not a de Polignac number, because 63669701 - 2²² = 59475397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63669707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31834850 + 31834851.

It is an arithmetic number, because the mean of its divisors is an integer number (31834851).

Almost surely, 2^63669701 is an apocalyptic number.

It is an amenable number.

63669701 is a deficient number, since it is larger than the sum of its proper divisors (1).

63669701 is an equidigital number, since it uses as much as digits as its factorization.

63669701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 63669701 is about 7979.3296084320. The cubic root of 63669701 is about 399.3106898946.

The spelling of 63669701 in words is "sixty-three million, six hundred sixty-nine thousand, seven hundred one".