90166673 has 2 divisors, whose sum is σ = 90166674. Its totient is φ = 90166672.

The previous prime is 90166627. The next prime is 90166697. The reversal of 90166673 is 37666109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56896849 + 33269824 = 7543^2 + 5768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90166673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (90166613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45083336 + 45083337.

It is an arithmetic number, because the mean of its divisors is an integer number (45083337).

Almost surely, 2^90166673 is an apocalyptic number.

It is an amenable number.

90166673 is a deficient number, since it is larger than the sum of its proper divisors (1).

90166673 is an equidigital number, since it uses as much as digits as its factorization.

90166673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 90166673 is about 9495.6133556501. The cubic root of 90166673 is about 448.4169444936.

The spelling of 90166673 in words is "ninety million, one hundred sixty-six thousand, six hundred seventy-three".