89219609 has 2 divisors, whose sum is σ = 89219610. Its totient is φ = 89219608.

The previous prime is 89219597. The next prime is 89219639. The reversal of 89219609 is 90691298.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56957209 + 32262400 = 7547^2 + 5680^2 .

It is a cyclic number.

It is not a de Polignac number, because 89219609 - 2⁸ = 89219353 is a prime.

It is a super-2 number, since 2×89219609² = 15920277260225762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 89219609.

It is not a weakly prime, because it can be changed into another prime (89219639) 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, 44609804 + 44609805.

It is an arithmetic number, because the mean of its divisors is an integer number (44609805).

Almost surely, 2^89219609 is an apocalyptic number.

It is an amenable number.

89219609 is a deficient number, since it is larger than the sum of its proper divisors (1).

89219609 is an equidigital number, since it uses as much as digits as its factorization.

89219609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 89219609 is about 9445.6132146092. The cubic root of 89219609 is about 446.8414357173.

The spelling of 89219609 in words is "eighty-nine million, two hundred nineteen thousand, six hundred nine".