89221619 has 2 divisors, whose sum is σ = 89221620. Its totient is φ = 89221618.

The previous prime is 89221609. The next prime is 89221621. The reversal of 89221619 is 91612298.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89221619 is a prime.

It is a super-2 number, since 2×89221619² = 15920994593962322, which contains 22 as substring.

Together with 89221621, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_5174678 and since 89221619 and 5174678 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (89221609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44610809 + 44610810.

It is an arithmetic number, because the mean of its divisors is an integer number (44610810).

Almost surely, 2^89221619 is an apocalyptic number.

89221619 is a deficient number, since it is larger than the sum of its proper divisors (1).

89221619 is an equidigital number, since it uses as much as digits as its factorization.

89221619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 89221619 is about 9445.7196126076. The cubic root of 89221619 is about 446.8447912746.

The spelling of 89221619 in words is "eighty-nine million, two hundred twenty-one thousand, six hundred nineteen".