63699967 has 2 divisors, whose sum is σ = 63699968. Its totient is φ = 63699966.

The previous prime is 63699959. The next prime is 63699971. The reversal of 63699967 is 76999636.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63699967 - 2³ = 63699959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63699907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31849983 + 31849984.

It is an arithmetic number, because the mean of its divisors is an integer number (31849984).

Almost surely, 2^63699967 is an apocalyptic number.

63699967 is a deficient number, since it is larger than the sum of its proper divisors (1).

63699967 is an equidigital number, since it uses as much as digits as its factorization.

63699967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3306744, while the sum is 55.

The square root of 63699967 is about 7981.2259083427. The cubic root of 63699967 is about 399.3739519207.

The spelling of 63699967 in words is "sixty-three million, six hundred ninety-nine thousand, nine hundred sixty-seven".