63730139 has 18 divisors (see below), whose sum is σ = 72881796. Its totient is φ = 55264720.

The previous prime is 63730129. The next prime is 63730151. The reversal of 63730139 is 93103736.

It is not a de Polignac number, because 63730139 - 2²⁴ = 46952923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63730129) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 767792 + ... + 767874.

Almost surely, 2^63730139 is an apocalyptic number.

63730139 is a deficient number, since it is larger than the sum of its proper divisors (9151657).

63730139 is an equidigital number, since it uses as much as digits as its factorization.

63730139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 32.

The square root of 63730139 is about 7983.1158703854. The cubic root of 63730139 is about 399.4369975257.

The spelling of 63730139 in words is "sixty-three million, seven hundred thirty thousand, one hundred thirty-nine".