89581891 has 8 divisors (see below), whose sum is σ = 108401760. Its totient is φ = 72267648.

The previous prime is 89581879. The next prime is 89581897. The reversal of 89581891 is 19818598.

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 89581891 - 2⁷ = 89581763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89581897) 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, 376276 + ... + 376513.

It is an arithmetic number, because the mean of its divisors is an integer number (13550220).

Almost surely, 2^89581891 is an apocalyptic number.

89581891 is a deficient number, since it is larger than the sum of its proper divisors (18819869).

89581891 is a wasteful number, since it uses less digits than its factorization.

89581891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752813.

The product of its digits is 207360, while the sum is 49.

The square root of 89581891 is about 9464.7710484723. The cubic root of 89581891 is about 447.4454284650.

The spelling of 89581891 in words is "eighty-nine million, five hundred eighty-one thousand, eight hundred ninety-one".