89090819 has 2 divisors, whose sum is σ = 89090820. Its totient is φ = 89090818.

The previous prime is 89090801. The next prime is 89090821. The reversal of 89090819 is 91809098.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89090819 - 2²⁴ = 72313603 is a prime.

It is a super-2 number, since 2×89090819² = 15874348060181522, which contains 22 as substring.

Together with 89090821, it forms a pair of twin primes.

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 89090819.

It is not a weakly prime, because it can be changed into another prime (89090839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44545409 + 44545410.

It is an arithmetic number, because the mean of its divisors is an integer number (44545410).

Almost surely, 2^89090819 is an apocalyptic number.

89090819 is a deficient number, since it is larger than the sum of its proper divisors (1).

89090819 is an equidigital number, since it uses as much as digits as its factorization.

89090819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 89090819 is about 9438.7933021123. The cubic root of 89090819 is about 446.6263244795.

The spelling of 89090819 in words is "eighty-nine million, ninety thousand, eight hundred nineteen".