89785919 has 2 divisors, whose sum is σ = 89785920. Its totient is φ = 89785918.

The previous prime is 89785909. The next prime is 89785921. The reversal of 89785919 is 91958798.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89785919 - 2¹² = 89781823 is a prime.

It is a super-2 number, since 2×89785919² = 16123022501349122, which contains 22 as substring.

Together with 89785921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89785909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44892959 + 44892960.

It is an arithmetic number, because the mean of its divisors is an integer number (44892960).

Almost surely, 2^89785919 is an apocalyptic number.

89785919 is a deficient number, since it is larger than the sum of its proper divisors (1).

89785919 is an equidigital number, since it uses as much as digits as its factorization.

89785919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 56.

The square root of 89785919 is about 9475.5432034264. The cubic root of 89785919 is about 447.7848652837.

The spelling of 89785919 in words is "eighty-nine million, seven hundred eighty-five thousand, nine hundred nineteen".