88717561 has 3 divisors (see below), whose sum is σ = 88726981. Its totient is φ = 88708142.

The previous prime is 88717549. The next prime is 88717589. The reversal of 88717561 is 16571788.

The square root of 88717561 is 9419.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 88717561 - 2¹⁵ = 88684793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88717511) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4710 + ... + 14128.

Almost surely, 2^88717561 is an apocalyptic number.

88717561 is the 9419-th square number.

88717561 is the 4710-th centered octagonal number.

It is an amenable number.

88717561 is a deficient number, since it is larger than the sum of its proper divisors (9420).

88717561 is an frugal number, since it uses more digits than its factorization.

88717561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18838 (or 9419 counting only the distinct ones).

The product of its digits is 94080, while the sum is 43.

The cubic root of 88717561 is about 446.0017176363.

The spelling of 88717561 in words is "eighty-eight million, seven hundred seventeen thousand, five hundred sixty-one".