63720129 has 16 divisors (see below), whose sum is σ = 97562880. Its totient is φ = 36585360.

The previous prime is 63720127. The next prime is 63720161. The reversal of 63720129 is 92102736.

It is not a de Polignac number, because 63720129 - 2¹ = 63720127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63720096 and 63720105.

It is not an unprimeable number, because it can be changed into a prime (63720121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50187 + ... + 51440.

It is an arithmetic number, because the mean of its divisors is an integer number (6097680).

Almost surely, 2^63720129 is an apocalyptic number.

It is an amenable number.

63720129 is a deficient number, since it is larger than the sum of its proper divisors (33842751).

63720129 is a wasteful number, since it uses less digits than its factorization.

63720129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101660.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 63720129 is about 7982.4888975808. The cubic root of 63720129 is about 399.4160834351.

The spelling of 63720129 in words is "sixty-three million, seven hundred twenty thousand, one hundred twenty-nine".