90047579 has 2 divisors, whose sum is σ = 90047580. Its totient is φ = 90047578.

The previous prime is 90047549. The next prime is 90047621. The reversal of 90047579 is 97574009.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90047579 - 2²⁰ = 88999003 is a prime.

It is a super-2 number, since 2×90047579² = 16217132967522482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90047549) 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, 45023789 + 45023790.

It is an arithmetic number, because the mean of its divisors is an integer number (45023790).

Almost surely, 2^90047579 is an apocalyptic number.

90047579 is a deficient number, since it is larger than the sum of its proper divisors (1).

90047579 is an equidigital number, since it uses as much as digits as its factorization.

90047579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 90047579 is about 9489.3402826540. The cubic root of 90047579 is about 448.2194313942.

The spelling of 90047579 in words is "ninety million, forty-seven thousand, five hundred seventy-nine".