89711887 has 2 divisors, whose sum is σ = 89711888. Its totient is φ = 89711886.

The previous prime is 89711879. The next prime is 89711927. The reversal of 89711887 is 78811798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89711887 - 2³ = 89711879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89711887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89711807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44855943 + 44855944.

It is an arithmetic number, because the mean of its divisors is an integer number (44855944).

Almost surely, 2^89711887 is an apocalyptic number.

89711887 is a deficient number, since it is larger than the sum of its proper divisors (1).

89711887 is an equidigital number, since it uses as much as digits as its factorization.

89711887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 49.

The square root of 89711887 is about 9471.6359199454. The cubic root of 89711887 is about 447.6617594004.

The spelling of 89711887 in words is "eighty-nine million, seven hundred eleven thousand, eight hundred eighty-seven".