9090971239 has 4 divisors (see below), whose sum is σ = 10389681424. Its totient is φ = 7792261056.

The previous prime is 9090971231. The next prime is 9090971273. The reversal of 9090971239 is 9321790909.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9090971239 - 2³ = 9090971231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9090971192 and 9090971201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090971231) 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, 649355082 + ... + 649355095.

It is an arithmetic number, because the mean of its divisors is an integer number (2597420356).

Almost surely, 2^9090971239 is an apocalyptic number.

9090971239 is a deficient number, since it is larger than the sum of its proper divisors (1298710185).

9090971239 is a wasteful number, since it uses less digits than its factorization.

9090971239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298710184.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 9090971239 is about 95346.5848313404. The cubic root of 9090971239 is about 2087.0687783374.

The spelling of 9090971239 in words is "nine billion, ninety million, nine hundred seventy-one thousand, two hundred thirty-nine".