90839509 has 8 divisors (see below), whose sum is σ = 93003552. Its totient is φ = 88692240.

The previous prime is 90839467. The next prime is 90839519. The reversal of 90839509 is 90593809.

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

It is a cyclic number.

It is not a de Polignac number, because 90839509 - 2¹³ = 90831317 is a prime.

It is a super-2 number, since 2×90839509² = 16503632790722162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90839519) 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, 7122 + ... + 15244.

It is an arithmetic number, because the mean of its divisors is an integer number (11625444).

Almost surely, 2^90839509 is an apocalyptic number.

It is an amenable number.

90839509 is a deficient number, since it is larger than the sum of its proper divisors (2164043).

90839509 is a wasteful number, since it uses less digits than its factorization.

90839509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8387.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 90839509 is about 9530.9762878731. The cubic root of 90839509 is about 449.5295643391.

The spelling of 90839509 in words is "ninety million, eight hundred thirty-nine thousand, five hundred nine".