89208709 has 2 divisors, whose sum is σ = 89208710. Its totient is φ = 89208708.

The previous prime is 89208689. The next prime is 89208719. The reversal of 89208709 is 90780298.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81902500 + 7306209 = 9050^2 + 2703^2 .

It is a cyclic number.

It is not a de Polignac number, because 89208709 - 2⁵ = 89208677 is a prime.

It is a super-2 number, since 2×89208709² = 15916387522893362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89208719) 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, 44604354 + 44604355.

It is an arithmetic number, because the mean of its divisors is an integer number (44604355).

Almost surely, 2^89208709 is an apocalyptic number.

It is an amenable number.

89208709 is a deficient number, since it is larger than the sum of its proper divisors (1).

89208709 is an equidigital number, since it uses as much as digits as its factorization.

89208709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 89208709 is about 9445.0362095653. The cubic root of 89208709 is about 446.8232380361.

The spelling of 89208709 in words is "eighty-nine million, two hundred eight thousand, seven hundred nine".