89726891 has 2 divisors, whose sum is σ = 89726892. Its totient is φ = 89726890.

The previous prime is 89726851. The next prime is 89726893. The reversal of 89726891 is 19862798.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89726891 - 2²⁶ = 22618027 is a prime.

Together with 89726893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89726893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44863445 + 44863446.

It is an arithmetic number, because the mean of its divisors is an integer number (44863446).

Almost surely, 2^89726891 is an apocalyptic number.

89726891 is a deficient number, since it is larger than the sum of its proper divisors (1).

89726891 is an equidigital number, since it uses as much as digits as its factorization.

89726891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 89726891 is about 9472.4279358568. The cubic root of 89726891 is about 447.6867146315.

The spelling of 89726891 in words is "eighty-nine million, seven hundred twenty-six thousand, eight hundred ninety-one".