90579193 has 2 divisors, whose sum is σ = 90579194. Its totient is φ = 90579192.

The previous prime is 90579187. The next prime is 90579227. The reversal of 90579193 is 39197509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88868329 + 1710864 = 9427^2 + 1308^2 .

It is a cyclic number.

It is not a de Polignac number, because 90579193 - 2⁵ = 90579161 is a prime.

It is not a weakly prime, because it can be changed into another prime (90579103) 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, 45289596 + 45289597.

It is an arithmetic number, because the mean of its divisors is an integer number (45289597).

Almost surely, 2^90579193 is an apocalyptic number.

It is an amenable number.

90579193 is a deficient number, since it is larger than the sum of its proper divisors (1).

90579193 is an equidigital number, since it uses as much as digits as its factorization.

90579193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 90579193 is about 9517.3101767254. The cubic root of 90579193 is about 449.0997524741.

The spelling of 90579193 in words is "ninety million, five hundred seventy-nine thousand, one hundred ninety-three".