90594409 has 2 divisors, whose sum is σ = 90594410. Its totient is φ = 90594408.

The previous prime is 90594397. The next prime is 90594443. The reversal of 90594409 is 90449509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47403225 + 43191184 = 6885^2 + 6572^2 .

It is a cyclic number.

It is not a de Polignac number, because 90594409 - 2¹⁹ = 90070121 is a prime.

It is not a weakly prime, because it can be changed into another prime (90594499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45297204 + 45297205.

It is an arithmetic number, because the mean of its divisors is an integer number (45297205).

Almost surely, 2^90594409 is an apocalyptic number.

It is an amenable number.

90594409 is a deficient number, since it is larger than the sum of its proper divisors (1).

90594409 is an equidigital number, since it uses as much as digits as its factorization.

90594409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 90594409 is about 9518.1095286827. The cubic root of 90594409 is about 449.1248984964.

The spelling of 90594409 in words is "ninety million, five hundred ninety-four thousand, four hundred nine".