89404891 has 2 divisors, whose sum is σ = 89404892. Its totient is φ = 89404890.

The previous prime is 89404879. The next prime is 89404901. The reversal of 89404891 is 19840498.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89404891 - 2⁵ = 89404859 is a prime.

It is not a weakly prime, because it can be changed into another prime (89404801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44702445 + 44702446.

It is an arithmetic number, because the mean of its divisors is an integer number (44702446).

Almost surely, 2^89404891 is an apocalyptic number.

89404891 is a deficient number, since it is larger than the sum of its proper divisors (1).

89404891 is an equidigital number, since it uses as much as digits as its factorization.

89404891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 89404891 is about 9455.4159612362. The cubic root of 89404891 is about 447.1505397764.

It can be divided in two parts, 8940 and 4891, that added together give a palindrome (13831).

The spelling of 89404891 in words is "eighty-nine million, four hundred four thousand, eight hundred ninety-one".