90253309 has 2 divisors, whose sum is σ = 90253310. Its totient is φ = 90253308.

The previous prime is 90253277. The next prime is 90253321. The reversal of 90253309 is 90335209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77827684 + 12425625 = 8822^2 + 3525^2 .

It is a cyclic number.

It is not a de Polignac number, because 90253309 - 2⁵ = 90253277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90253349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45126654 + 45126655.

It is an arithmetic number, because the mean of its divisors is an integer number (45126655).

Almost surely, 2^90253309 is an apocalyptic number.

It is an amenable number.

90253309 is a deficient number, since it is larger than the sum of its proper divisors (1).

90253309 is an equidigital number, since it uses as much as digits as its factorization.

90253309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 90253309 is about 9500.1741562984. The cubic root of 90253309 is about 448.5605179195.

The spelling of 90253309 in words is "ninety million, two hundred fifty-three thousand, three hundred nine".