90915309 has 12 divisors (see below), whose sum is σ = 131506752. Its totient is φ = 60525000.

The previous prime is 90915277. The next prime is 90915317. The reversal of 90915309 is 90351909.

It is not a de Polignac number, because 90915309 - 2⁵ = 90915277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90915329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34 + ... + 13484.

It is an arithmetic number, because the mean of its divisors is an integer number (10958896).

Almost surely, 2^90915309 is an apocalyptic number.

It is an amenable number.

90915309 is a deficient number, since it is larger than the sum of its proper divisors (40591443).

90915309 is a wasteful number, since it uses less digits than its factorization.

90915309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14208 (or 14205 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 36.

The square root of 90915309 is about 9534.9519663184. The cubic root of 90915309 is about 449.6545645293.

It can be divided in two parts, 9091 and 5309, that added together give a square (14400 = 120²).

The spelling of 90915309 in words is "ninety million, nine hundred fifteen thousand, three hundred nine".