97081609 has 9 divisors (see below), whose sum is σ = 99349837. Its totient is φ = 94864684.

The previous prime is 97081601. The next prime is 97081627. The reversal of 97081609 is 90618079.

The square root of 97081609 is 9853.

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

It is not a de Polignac number, because 97081609 - 2³ = 97081601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97081601) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 581244 + ... + 581410.

Almost surely, 2^97081609 is an apocalyptic number.

97081609 is the 9853-rd square number.

97081609 is the 4927-th centered octagonal number.

It is an amenable number.

97081609 is a deficient number, since it is larger than the sum of its proper divisors (2268228).

97081609 is an frugal number, since it uses more digits than its factorization.

97081609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The cubic root of 97081609 is about 459.5989084086.

The spelling of 97081609 in words is "ninety-seven million, eighty-one thousand, six hundred nine".