90559279 has 2 divisors, whose sum is σ = 90559280. Its totient is φ = 90559278.

The previous prime is 90559253. The next prime is 90559291. The reversal of 90559279 is 97295509.

It is a strong prime.

It is an emirp because it is prime and its reverse (97295509) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90559279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90559219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45279639 + 45279640.

It is an arithmetic number, because the mean of its divisors is an integer number (45279640).

Almost surely, 2^90559279 is an apocalyptic number.

90559279 is a deficient number, since it is larger than the sum of its proper divisors (1).

90559279 is an equidigital number, since it uses as much as digits as its factorization.

90559279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 255150, while the sum is 46.

The square root of 90559279 is about 9516.2639202578. The cubic root of 90559279 is about 449.0668382633.

The spelling of 90559279 in words is "ninety million, five hundred fifty-nine thousand, two hundred seventy-nine".