97865889 has 24 divisors (see below), whose sum is σ = 151875360. Its totient is φ = 55820160.

The previous prime is 97865863. The next prime is 97865947. The reversal of 97865889 is 98856879.

It is a happy number.

It is not a de Polignac number, because 97865889 - 2¹¹ = 97863841 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (97865839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1759 + ... + 14100.

It is an arithmetic number, because the mean of its divisors is an integer number (6328140).

Almost surely, 2^97865889 is an apocalyptic number.

It is an amenable number.

97865889 is a deficient number, since it is larger than the sum of its proper divisors (54009471).

97865889 is a wasteful number, since it uses less digits than its factorization.

97865889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15901 (or 15890 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 60.

The square root of 97865889 is about 9892.7189892365. The cubic root of 97865889 is about 460.8332235989.

The spelling of 97865889 in words is "ninety-seven million, eight hundred sixty-five thousand, eight hundred eighty-nine".