88947721 has 4 divisors (see below), whose sum is σ = 93629200. Its totient is φ = 84266244.

The previous prime is 88947713. The next prime is 88947767. The reversal of 88947721 is 12774988.

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 88947721 - 2³ = 88947713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88947421) 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, 2340711 + ... + 2340748.

It is an arithmetic number, because the mean of its divisors is an integer number (23407300).

Almost surely, 2^88947721 is an apocalyptic number.

It is an amenable number.

88947721 is a deficient number, since it is larger than the sum of its proper divisors (4681479).

88947721 is a wasteful number, since it uses less digits than its factorization.

88947721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4681478.

The product of its digits is 225792, while the sum is 46.

The square root of 88947721 is about 9431.2099435862. The cubic root of 88947721 is about 446.3870720580.

The spelling of 88947721 in words is "eighty-eight million, nine hundred forty-seven thousand, seven hundred twenty-one".