90309505 has 16 divisors (see below), whose sum is σ = 127318464. Its totient is φ = 60626880.

The previous prime is 90309497. The next prime is 90309517. The reversal of 90309505 is 50590309.

It is not a de Polignac number, because 90309505 - 2³ = 90309497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62439 + ... + 63868.

It is an arithmetic number, because the mean of its divisors is an integer number (7957404).

Almost surely, 2^90309505 is an apocalyptic number.

It is an amenable number.

90309505 is a deficient number, since it is larger than the sum of its proper divisors (37008959).

90309505 is a wasteful number, since it uses less digits than its factorization.

90309505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126336.

The product of its (nonzero) digits is 6075, while the sum is 31.

The square root of 90309505 is about 9503.1313260420. The cubic root of 90309505 is about 448.6535969700.

The spelling of 90309505 in words is "ninety million, three hundred nine thousand, five hundred five".