90331013309 has 4 divisors (see below), whose sum is σ = 90621467040. Its totient is φ = 90040559580.

The previous prime is 90331013299. The next prime is 90331013351.

90331013309 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90331013309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90331013389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145226399 + ... + 145227020.

It is an arithmetic number, because the mean of its divisors is an integer number (22655366760).

Almost surely, 2^90331013309 is an apocalyptic number.

It is an amenable number.

90331013309 is a deficient number, since it is larger than the sum of its proper divisors (290453731).

90331013309 is a wasteful number, since it uses less digits than its factorization.

90331013309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290453730.

The product of its (nonzero) digits is 6561, while the sum is 32.

It can be divided in two parts, 903310 and 13309, that added together give a palindrome (916619).

The spelling of 90331013309 in words is "ninety billion, three hundred thirty-one million, thirteen thousand, three hundred nine".