89970773309 has 2 divisors, whose sum is σ = 89970773310. Its totient is φ = 89970773308.

The previous prime is 89970773251. The next prime is 89970773329. The reversal of 89970773309 is 90337707998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55732822084 + 34237951225 = 236078^2 + 185035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89970773309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89970773329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44985386654 + 44985386655.

It is an arithmetic number, because the mean of its divisors is an integer number (44985386655).

Almost surely, 2^89970773309 is an apocalyptic number.

It is an amenable number.

89970773309 is a deficient number, since it is larger than the sum of its proper divisors (1).

89970773309 is an equidigital number, since it uses as much as digits as its factorization.

89970773309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18003384, while the sum is 62.

The spelling of 89970773309 in words is "eighty-nine billion, nine hundred seventy million, seven hundred seventy-three thousand, three hundred nine".