90579623 has 2 divisors, whose sum is σ = 90579624. Its totient is φ = 90579622.

The previous prime is 90579607. The next prime is 90579647. The reversal of 90579623 is 32697509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90579623 - 2⁴ = 90579607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90579323) 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, 45289811 + 45289812.

It is an arithmetic number, because the mean of its divisors is an integer number (45289812).

Almost surely, 2^90579623 is an apocalyptic number.

90579623 is a deficient number, since it is larger than the sum of its proper divisors (1).

90579623 is an equidigital number, since it uses as much as digits as its factorization.

90579623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 90579623 is about 9517.3327671150. The cubic root of 90579623 is about 449.1004631325.

The spelling of 90579623 in words is "ninety million, five hundred seventy-nine thousand, six hundred twenty-three".