89042309 has 2 divisors, whose sum is σ = 89042310. Its totient is φ = 89042308.

The previous prime is 89042273. The next prime is 89042329. The reversal of 89042309 is 90324098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88548100 + 494209 = 9410^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 89042309 - 2⁸ = 89042053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89042329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44521154 + 44521155.

It is an arithmetic number, because the mean of its divisors is an integer number (44521155).

Almost surely, 2^89042309 is an apocalyptic number.

It is an amenable number.

89042309 is a deficient number, since it is larger than the sum of its proper divisors (1).

89042309 is an equidigital number, since it uses as much as digits as its factorization.

89042309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 89042309 is about 9436.2232381393. The cubic root of 89042309 is about 446.5452470023.

The spelling of 89042309 in words is "eighty-nine million, forty-two thousand, three hundred nine".