88491817 has 8 divisors (see below), whose sum is σ = 95983272. Its totient is φ = 81254400.

The previous prime is 88491811. The next prime is 88491853. The reversal of 88491817 is 71819488.

It can be written as a sum of positive squares in 4 ways, for example, as 28955161 + 59536656 = 5381^2 + 7716^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88491817 is a prime.

It is a super-2 number, since 2×88491817² = 15661603351922978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88491811) 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, 62784 + ... + 64177.

It is an arithmetic number, because the mean of its divisors is an integer number (11997909).

Almost surely, 2^88491817 is an apocalyptic number.

It is an amenable number.

88491817 is a deficient number, since it is larger than the sum of its proper divisors (7491455).

88491817 is a wasteful number, since it uses less digits than its factorization.

88491817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127019.

The product of its digits is 129024, while the sum is 46.

The square root of 88491817 is about 9407.0089295163. The cubic root of 88491817 is about 445.6231089083.

The spelling of 88491817 in words is "eighty-eight million, four hundred ninety-one thousand, eight hundred seventeen".