97842865 has 4 divisors (see below), whose sum is σ = 117411444. Its totient is φ = 78274288.

The previous prime is 97842859. The next prime is 97842883. The reversal of 97842865 is 56824879.

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

It can be written as a sum of positive squares in 2 ways, for example, as 70006689 + 27836176 = 8367^2 + 5276^2 .

It is a cyclic number.

It is not a de Polignac number, because 97842865 - 2²³ = 89454257 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9784282 + ... + 9784291.

It is an arithmetic number, because the mean of its divisors is an integer number (29352861).

Almost surely, 2^97842865 is an apocalyptic number.

It is an amenable number.

97842865 is a deficient number, since it is larger than the sum of its proper divisors (19568579).

97842865 is a wasteful number, since it uses less digits than its factorization.

97842865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19568578.

The product of its digits is 967680, while the sum is 49.

The square root of 97842865 is about 9891.5552366653. Note that the first 3 decimals coincide. The cubic root of 97842865 is about 460.7970821117.

The spelling of 97842865 in words is "ninety-seven million, eight hundred forty-two thousand, eight hundred sixty-five".