89407891 has 2 divisors, whose sum is σ = 89407892. Its totient is φ = 89407890.

The previous prime is 89407861. The next prime is 89407909. The reversal of 89407891 is 19870498.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89407891 - 2¹¹ = 89405843 is a prime.

It is not a weakly prime, because it can be changed into another prime (89407861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44703945 + 44703946.

It is an arithmetic number, because the mean of its divisors is an integer number (44703946).

Almost surely, 2^89407891 is an apocalyptic number.

89407891 is a deficient number, since it is larger than the sum of its proper divisors (1).

89407891 is an equidigital number, since it uses as much as digits as its factorization.

89407891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 89407891 is about 9455.5745991452. The cubic root of 89407891 is about 447.1555411307.

The spelling of 89407891 in words is "eighty-nine million, four hundred seven thousand, eight hundred ninety-one".