89812091 has 2 divisors, whose sum is σ = 89812092. Its totient is φ = 89812090.

The previous prime is 89812057. The next prime is 89812097. The reversal of 89812091 is 19021898.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89812091 - 2²² = 85617787 is a prime.

It is a super-3 number, since 3×89812091³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (89812097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44906045 + 44906046.

It is an arithmetic number, because the mean of its divisors is an integer number (44906046).

Almost surely, 2^89812091 is an apocalyptic number.

89812091 is a deficient number, since it is larger than the sum of its proper divisors (1).

89812091 is an equidigital number, since it uses as much as digits as its factorization.

89812091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 89812091 is about 9476.9241318056. The cubic root of 89812091 is about 447.8283698298.

The spelling of 89812091 in words is "eighty-nine million, eight hundred twelve thousand, ninety-one".