88355721 has 16 divisors (see below), whose sum is σ = 122189760. Its totient is φ = 56723520.

The previous prime is 88355699. The next prime is 88355747. The reversal of 88355721 is 12755388.

It is not a de Polignac number, because 88355721 - 2¹⁴ = 88339337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 88355721.

It is not an unprimeable number, because it can be changed into a prime (88355791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39006 + ... + 41208.

It is an arithmetic number, because the mean of its divisors is an integer number (7636860).

Almost surely, 2^88355721 is an apocalyptic number.

It is an amenable number.

88355721 is a deficient number, since it is larger than the sum of its proper divisors (33834039).

88355721 is a wasteful number, since it uses less digits than its factorization.

88355721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696.

The product of its digits is 67200, while the sum is 39.

The square root of 88355721 is about 9399.7723908614. The cubic root of 88355721 is about 445.3945429902.

The spelling of 88355721 in words is "eighty-eight million, three hundred fifty-five thousand, seven hundred twenty-one".