2138292091 has 8 divisors (see below), whose sum is σ = 2423975120. Its totient is φ = 1869923232.

The previous prime is 2138292077. The next prime is 2138292133. The reversal of 2138292091 is 1902928312.

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 2138292091 - 2⁷ = 2138291963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2138292091.

It is not an unprimeable number, because it can be changed into a prime (2138292031) 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, 4328280 + ... + 4328773.

It is an arithmetic number, because the mean of its divisors is an integer number (302996890).

Almost surely, 2^2138292091 is an apocalyptic number.

2138292091 is a deficient number, since it is larger than the sum of its proper divisors (285683029).

2138292091 is a wasteful number, since it uses less digits than its factorization.

2138292091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8657085.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 2138292091 is about 46241.6705039946. The cubic root of 2138292091 is about 1288.3158301385.

The spelling of 2138292091 in words is "two billion, one hundred thirty-eight million, two hundred ninety-two thousand, ninety-one".