64199963 has 2 divisors, whose sum is σ = 64199964. Its totient is φ = 64199962.

The previous prime is 64199909. The next prime is 64200001. The reversal of 64199963 is 36999146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64199963 - 2⁶ = 64199899 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (64399963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32099981 + 32099982.

It is an arithmetic number, because the mean of its divisors is an integer number (32099982).

Almost surely, 2^64199963 is an apocalyptic number.

64199963 is a deficient number, since it is larger than the sum of its proper divisors (1).

64199963 is an equidigital number, since it uses as much as digits as its factorization.

64199963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 47.

The square root of 64199963 is about 8012.4879407086. The cubic root of 64199963 is about 400.4161564677.

The spelling of 64199963 in words is "sixty-four million, one hundred ninety-nine thousand, nine hundred sixty-three".