97889567 has 4 divisors (see below), whose sum is σ = 99494376. Its totient is φ = 96284760.

The previous prime is 97889563. The next prime is 97889639. The reversal of 97889567 is 76598879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97889567 - 2² = 97889563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97889563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802313 + ... + 802434.

It is an arithmetic number, because the mean of its divisors is an integer number (24873594).

Almost surely, 2^97889567 is an apocalyptic number.

97889567 is a deficient number, since it is larger than the sum of its proper divisors (1604809).

97889567 is a wasteful number, since it uses less digits than its factorization.

97889567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604808.

The product of its digits is 7620480, while the sum is 59.

The square root of 97889567 is about 9893.9156555936. The cubic root of 97889567 is about 460.8703857783.

The spelling of 97889567 in words is "ninety-seven million, eight hundred eighty-nine thousand, five hundred sixty-seven".