90723309 has 8 divisors (see below), whose sum is σ = 127331040. Its totient is φ = 57298896.

The previous prime is 90723289. The next prime is 90723319. The reversal of 90723309 is 90332709.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90723309 - 2²¹ = 88626157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90723309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90723319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795762 + ... + 795875.

It is an arithmetic number, because the mean of its divisors is an integer number (15916380).

Almost surely, 2^90723309 is an apocalyptic number.

It is an amenable number.

90723309 is a deficient number, since it is larger than the sum of its proper divisors (36607731).

90723309 is a wasteful number, since it uses less digits than its factorization.

90723309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591659.

The product of its (nonzero) digits is 10206, while the sum is 33.

The square root of 90723309 is about 9524.8784244210. The cubic root of 90723309 is about 449.3378062793.

The spelling of 90723309 in words is "ninety million, seven hundred twenty-three thousand, three hundred nine".