89957191 has 4 divisors (see below), whose sum is σ = 94691800. Its totient is φ = 85222584.

The previous prime is 89957177. The next prime is 89957207. The reversal of 89957191 is 19175998.

It is a happy number.

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 89957191 - 2¹⁷ = 89826119 is a prime.

It is a super-2 number, since 2×89957191² = 16184592425220962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89958191) 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, 2367276 + ... + 2367313.

It is an arithmetic number, because the mean of its divisors is an integer number (23672950).

Almost surely, 2^89957191 is an apocalyptic number.

89957191 is a deficient number, since it is larger than the sum of its proper divisors (4734609).

89957191 is a wasteful number, since it uses less digits than its factorization.

89957191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4734608.

The product of its digits is 204120, while the sum is 49.

The square root of 89957191 is about 9484.5764797380. The cubic root of 89957191 is about 448.0694098849.

The spelling of 89957191 in words is "eighty-nine million, nine hundred fifty-seven thousand, one hundred ninety-one".