89091661 has 8 divisors (see below), whose sum is σ = 90244224. Its totient is φ = 87946800.

The previous prime is 89091641. The next prime is 89091689. The reversal of 89091661 is 16619098.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 89091661 - 2⁷ = 89091533 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 (89091641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23451 + ... + 26983.

It is an arithmetic number, because the mean of its divisors is an integer number (11280528).

Almost surely, 2^89091661 is an apocalyptic number.

It is an amenable number.

89091661 is a deficient number, since it is larger than the sum of its proper divisors (1152563).

89091661 is a wasteful number, since it uses less digits than its factorization.

89091661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 89091661 is about 9438.8379051661. The cubic root of 89091661 is about 446.6277315014.

The spelling of 89091661 in words is "eighty-nine million, ninety-one thousand, six hundred sixty-one".