90605849 has 2 divisors, whose sum is σ = 90605850. Its totient is φ = 90605848.

The previous prime is 90605797. The next prime is 90605861. The reversal of 90605849 is 94850609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 38837824 = 7195^2 + 6232^2 .

It is a cyclic number.

It is not a de Polignac number, because 90605849 - 2¹⁶ = 90540313 is a prime.

It is not a weakly prime, because it can be changed into another prime (90605149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45302924 + 45302925.

It is an arithmetic number, because the mean of its divisors is an integer number (45302925).

Almost surely, 2^90605849 is an apocalyptic number.

It is an amenable number.

90605849 is a deficient number, since it is larger than the sum of its proper divisors (1).

90605849 is an equidigital number, since it uses as much as digits as its factorization.

90605849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 90605849 is about 9518.7104693861. The cubic root of 90605849 is about 449.1438024319.

The spelling of 90605849 in words is "ninety million, six hundred five thousand, eight hundred forty-nine".