88638729 has 4 divisors (see below), whose sum is σ = 118184976. Its totient is φ = 59092484.

The previous prime is 88638701. The next prime is 88638763. The reversal of 88638729 is 92783688.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 88638729 - 2¹² = 88634633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88638829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14773119 + ... + 14773124.

It is an arithmetic number, because the mean of its divisors is an integer number (29546244).

Almost surely, 2^88638729 is an apocalyptic number.

It is an amenable number.

88638729 is a deficient number, since it is larger than the sum of its proper divisors (29546247).

88638729 is a wasteful number, since it uses less digits than its factorization.

88638729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29546246.

The product of its digits is 1161216, while the sum is 51.

The square root of 88638729 is about 9414.8143369904. The cubic root of 88638729 is about 445.8695768441.

The spelling of 88638729 in words is "eighty-eight million, six hundred thirty-eight thousand, seven hundred twenty-nine".