90573709 has 2 divisors, whose sum is σ = 90573710. Its totient is φ = 90573708.

The previous prime is 90573697. The next prime is 90573727. The reversal of 90573709 is 90737509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67322025 + 23251684 = 8205^2 + 4822^2 .

It is a cyclic number.

It is not a de Polignac number, because 90573709 - 2¹⁷ = 90442637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90553709) 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, 45286854 + 45286855.

It is an arithmetic number, because the mean of its divisors is an integer number (45286855).

Almost surely, 2^90573709 is an apocalyptic number.

It is an amenable number.

90573709 is a deficient number, since it is larger than the sum of its proper divisors (1).

90573709 is an equidigital number, since it uses as much as digits as its factorization.

90573709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59535, while the sum is 40.

The square root of 90573709 is about 9517.0220657515. The cubic root of 90573709 is about 449.0906889035.

The spelling of 90573709 in words is "ninety million, five hundred seventy-three thousand, seven hundred nine".