89891797 has 4 divisors (see below), whose sum is σ = 93800160. Its totient is φ = 85983436.

The previous prime is 89891783. The next prime is 89891819. The reversal of 89891797 is 79719898.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89891797 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 (89891707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1954147 + ... + 1954192.

It is an arithmetic number, because the mean of its divisors is an integer number (23450040).

Almost surely, 2^89891797 is an apocalyptic number.

It is an amenable number.

89891797 is a deficient number, since it is larger than the sum of its proper divisors (3908363).

89891797 is a wasteful number, since it uses less digits than its factorization.

89891797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3908362.

The product of its digits is 2286144, while the sum is 58.

The square root of 89891797 is about 9481.1284665909. The cubic root of 89891797 is about 447.9608095102.

The spelling of 89891797 in words is "eighty-nine million, eight hundred ninety-one thousand, seven hundred ninety-seven".