97889569 has 8 divisors (see below), whose sum is σ = 101106792. Its totient is φ = 94723200.

The previous prime is 97889563. The next prime is 97889639. The reversal of 97889569 is 96598879.

It can be written as a sum of positive squares in 4 ways, for example, as 32490000 + 65399569 = 5700^2 + 8087^2 .

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-97889569 is a prime.

It is a super-2 number, since 2×97889569² = 19164735438011522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97889563) 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, 8782 + ... + 16519.

It is an arithmetic number, because the mean of its divisors is an integer number (12638349).

Almost surely, 2^97889569 is an apocalyptic number.

It is an amenable number.

97889569 is a deficient number, since it is larger than the sum of its proper divisors (3217223).

97889569 is a wasteful number, since it uses less digits than its factorization.

97889569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25427.

The product of its digits is 9797760, while the sum is 61.

The square root of 97889569 is about 9893.9157566658. The cubic root of 97889569 is about 460.8703889170.

The spelling of 97889569 in words is "ninety-seven million, eight hundred eighty-nine thousand, five hundred sixty-nine".