97785873 has 28 divisors (see below), whose sum is σ = 151376128. Its totient is φ = 63073080.

The previous prime is 97785859. The next prime is 97785881. The reversal of 97785873 is 37858779.

It is not a de Polignac number, because 97785873 - 2⁵ = 97785841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97785823) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 20436 + ... + 24762.

Almost surely, 2^97785873 is an apocalyptic number.

97785873 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

It is an amenable number.

97785873 is a deficient number, since it is larger than the sum of its proper divisors (53590255).

97785873 is an equidigital number, since it uses as much as digits as its factorization.

97785873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376 (or 4361 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 97785873 is about 9888.6739758170. The cubic root of 97785873 is about 460.7075956071.

It can be divided in two parts, 9778 and 5873, that added together give a palindrome (15651).

The spelling of 97785873 in words is "ninety-seven million, seven hundred eighty-five thousand, eight hundred seventy-three".