89561911 has 2 divisors, whose sum is σ = 89561912. Its totient is φ = 89561910.

The previous prime is 89561903. The next prime is 89561957. The reversal of 89561911 is 11916598.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89561911 - 2³ = 89561903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89561971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44780955 + 44780956.

It is an arithmetic number, because the mean of its divisors is an integer number (44780956).

Almost surely, 2^89561911 is an apocalyptic number.

89561911 is a deficient number, since it is larger than the sum of its proper divisors (1).

89561911 is an equidigital number, since it uses as much as digits as its factorization.

89561911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 40.

The square root of 89561911 is about 9463.7154965690. The cubic root of 89561911 is about 447.4121604898.

The spelling of 89561911 in words is "eighty-nine million, five hundred sixty-one thousand, nine hundred eleven".