90394273 has 2 divisors, whose sum is σ = 90394274. Its totient is φ = 90394272.

The previous prime is 90394223. The next prime is 90394303. The reversal of 90394273 is 37249309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87459904 + 2934369 = 9352^2 + 1713^2 .

It is a cyclic number.

It is not a de Polignac number, because 90394273 - 2¹³ = 90386081 is a prime.

It is a super-2 number, since 2×90394273² = 16342249182397058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90394223) 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, 45197136 + 45197137.

It is an arithmetic number, because the mean of its divisors is an integer number (45197137).

Almost surely, 2^90394273 is an apocalyptic number.

It is an amenable number.

90394273 is a deficient number, since it is larger than the sum of its proper divisors (1).

90394273 is an equidigital number, since it uses as much as digits as its factorization.

90394273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 90394273 is about 9507.5902835577. The cubic root of 90394273 is about 448.7939276215.

The spelling of 90394273 in words is "ninety million, three hundred ninety-four thousand, two hundred seventy-three".