89440919 has 2 divisors, whose sum is σ = 89440920. Its totient is φ = 89440918.

The previous prime is 89440909. The next prime is 89440933. The reversal of 89440919 is 91904498.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89440919 is a prime.

It is a super-2 number, since 2×89440919² = 15999355983129122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89440919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89440909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44720459 + 44720460.

It is an arithmetic number, because the mean of its divisors is an integer number (44720460).

Almost surely, 2^89440919 is an apocalyptic number.

89440919 is a deficient number, since it is larger than the sum of its proper divisors (1).

89440919 is an equidigital number, since it uses as much as digits as its factorization.

89440919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 89440919 is about 9457.3209208528. The cubic root of 89440919 is about 447.2105953132.

The spelling of 89440919 in words is "eighty-nine million, four hundred forty thousand, nine hundred nineteen".