89111791 has 2 divisors, whose sum is σ = 89111792. Its totient is φ = 89111790.

The previous prime is 89111783. The next prime is 89111797. The reversal of 89111791 is 19711198.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89111791 - 2³ = 89111783 is a prime.

It is a super-2 number, since 2×89111791² = 15881822590455362, which contains 22 as substring.

It is equal to p_5168656 and since 89111791 and 5168656 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89111791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89111797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44555895 + 44555896.

It is an arithmetic number, because the mean of its divisors is an integer number (44555896).

Almost surely, 2^89111791 is an apocalyptic number.

89111791 is a deficient number, since it is larger than the sum of its proper divisors (1).

89111791 is an equidigital number, since it uses as much as digits as its factorization.

89111791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 37.

The square root of 89111791 is about 9439.9041838358. The cubic root of 89111791 is about 446.6613670444.

The spelling of 89111791 in words is "eighty-nine million, one hundred eleven thousand, seven hundred ninety-one".