90120539 has 2 divisors, whose sum is σ = 90120540. Its totient is φ = 90120538.

The previous prime is 90120529. The next prime is 90120557. The reversal of 90120539 is 93502109.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90120539 - 2²⁴ = 73343323 is a prime.

It is not a weakly prime, because it can be changed into another prime (90120529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45060269 + 45060270.

It is an arithmetic number, because the mean of its divisors is an integer number (45060270).

Almost surely, 2^90120539 is an apocalyptic number.

90120539 is a deficient number, since it is larger than the sum of its proper divisors (1).

90120539 is an equidigital number, since it uses as much as digits as its factorization.

90120539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 90120539 is about 9493.1838178769. The cubic root of 90120539 is about 448.3404535690.

The spelling of 90120539 in words is "ninety million, one hundred twenty thousand, five hundred thirty-nine".