63720130 has 8 divisors (see below), whose sum is σ = 114696252. Its totient is φ = 25488048.

The previous prime is 63720127. The next prime is 63720161. The reversal of 63720130 is 3102736.

It can be written as a sum of positive squares in 2 ways, for example, as 62204769 + 1515361 = 7887^2 + 1231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3185997 + ... + 3186016.

Almost surely, 2^63720130 is an apocalyptic number.

63720130 is a deficient number, since it is larger than the sum of its proper divisors (50976122).

63720130 is a wasteful number, since it uses less digits than its factorization.

63720130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6372020.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 63720130 is about 7982.4889602179. The cubic root of 63720130 is about 399.4160855245.

Adding to 63720130 its reverse (3102736), we get a palindrome (66822866).

The spelling of 63720130 in words is "sixty-three million, seven hundred twenty thousand, one hundred thirty".