89612191 has 2 divisors, whose sum is σ = 89612192. Its totient is φ = 89612190.

The previous prime is 89612177. The next prime is 89612203. The reversal of 89612191 is 19121698.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89612191 - 2⁷ = 89612063 is a prime.

It is equal to p_5195926 and since 89612191 and 5195926 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 89612191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89612141) 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, 44806095 + 44806096.

It is an arithmetic number, because the mean of its divisors is an integer number (44806096).

Almost surely, 2^89612191 is an apocalyptic number.

89612191 is a deficient number, since it is larger than the sum of its proper divisors (1).

89612191 is an equidigital number, since it uses as much as digits as its factorization.

89612191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 37.

The square root of 89612191 is about 9466.3715857767. The cubic root of 89612191 is about 447.4958704611.

The spelling of 89612191 in words is "eighty-nine million, six hundred twelve thousand, one hundred ninety-one".