90839205239 has 8 divisors (see below), whose sum is σ = 92623370832. Its totient is φ = 89064555840.

The previous prime is 90839205217. The next prime is 90839205269. The reversal of 90839205239 is 93250293809.

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 90839205239 - 2²⁰ = 90838156663 is a prime.

It is a super-2 number, since 2×90839205239² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90839205269) 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, 2359769 + ... + 2397954.

It is an arithmetic number, because the mean of its divisors is an integer number (11577921354).

Almost surely, 2^90839205239 is an apocalyptic number.

90839205239 is a deficient number, since it is larger than the sum of its proper divisors (1784165593).

90839205239 is a wasteful number, since it uses less digits than its factorization.

90839205239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4758097.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The spelling of 90839205239 in words is "ninety billion, eight hundred thirty-nine million, two hundred five thousand, two hundred thirty-nine".