63128139 has 8 divisors (see below), whose sum is σ = 84367872. Its totient is φ = 41986920.

The previous prime is 63128129. The next prime is 63128147. The reversal of 63128139 is 93182136.

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

It is a de Polignac number, because none of the positive numbers 2^k-63128139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63128129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23119 + ... + 25704.

It is an arithmetic number, because the mean of its divisors is an integer number (10545984).

Almost surely, 2^63128139 is an apocalyptic number.

63128139 is a deficient number, since it is larger than the sum of its proper divisors (21239733).

63128139 is a wasteful number, since it uses less digits than its factorization.

63128139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49257.

The product of its digits is 7776, while the sum is 33.

The square root of 63128139 is about 7945.3218311155. The cubic root of 63128139 is about 398.1753118564.

The spelling of 63128139 in words is "sixty-three million, one hundred twenty-eight thousand, one hundred thirty-nine".