89185491 has 6 divisors (see below), whose sum is σ = 128823500. Its totient is φ = 59456988.

The previous prime is 89185433. The next prime is 89185501. The reversal of 89185491 is 19458198.

89185491 is a `hidden beast` number, since 89 + 1 + 85 + 491 = 666.

It is not a de Polignac number, because 89185491 - 2⁶ = 89185427 is a prime.

It is a super-2 number, since 2×89185491² = 15908103609822162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89180491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4954741 + ... + 4954758.

Almost surely, 2^89185491 is an apocalyptic number.

89185491 is a deficient number, since it is larger than the sum of its proper divisors (39638009).

89185491 is a wasteful number, since it uses less digits than its factorization.

89185491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9909505 (or 9909502 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 89185491 is about 9443.8070183586. The cubic root of 89185491 is about 446.7844703634.

It can be divided in two parts, 89185 and 491, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 89185491 in words is "eighty-nine million, one hundred eighty-five thousand, four hundred ninety-one".