89199665 has 16 divisors (see below), whose sum is σ = 108830736. Its totient is φ = 70176000.

The previous prime is 89199647. The next prime is 89199667. The reversal of 89199665 is 56699198.

It can be written as a sum of positive squares in 8 ways, for example, as 20757136 + 68442529 = 4556^2 + 8273^2 .

It is not a de Polignac number, because 89199665 - 2¹² = 89195569 is a prime.

It is a super-2 number, since 2×89199665² = 15913160472224450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89199667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86855 + ... + 87875.

It is an arithmetic number, because the mean of its divisors is an integer number (6801921).

Almost surely, 2^89199665 is an apocalyptic number.

It is an amenable number.

89199665 is a deficient number, since it is larger than the sum of its proper divisors (19631071).

89199665 is a wasteful number, since it uses less digits than its factorization.

89199665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300.

The product of its digits is 1049760, while the sum is 53.

The square root of 89199665 is about 9444.5574274288. The cubic root of 89199665 is about 446.8081378440.

The spelling of 89199665 in words is "eighty-nine million, one hundred ninety-nine thousand, six hundred sixty-five".