90574879 has 2 divisors, whose sum is σ = 90574880. Its totient is φ = 90574878.

The previous prime is 90574871. The next prime is 90574889. The reversal of 90574879 is 97847509.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (97847509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90574879 - 2³ = 90574871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90574871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45287439 + 45287440.

It is an arithmetic number, because the mean of its divisors is an integer number (45287440).

Almost surely, 2^90574879 is an apocalyptic number.

90574879 is a deficient number, since it is larger than the sum of its proper divisors (1).

90574879 is an equidigital number, since it uses as much as digits as its factorization.

90574879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 90574879 is about 9517.0835343607. The cubic root of 90574879 is about 449.0926226281.

The spelling of 90574879 in words is "ninety million, five hundred seventy-four thousand, eight hundred seventy-nine".