2159070091 has 4 divisors (see below), whose sum is σ = 2286074232. Its totient is φ = 2032065952.

The previous prime is 2159070071. The next prime is 2159070163. The reversal of 2159070091 is 1900709512.

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 2159070091 - 2¹⁹ = 2158545803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2159070041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63502045 + ... + 63502078.

It is an arithmetic number, because the mean of its divisors is an integer number (571518558).

Almost surely, 2^2159070091 is an apocalyptic number.

2159070091 is a deficient number, since it is larger than the sum of its proper divisors (127004141).

2159070091 is a wasteful number, since it uses less digits than its factorization.

2159070091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127004140.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 2159070091 is about 46465.7948495450. The cubic root of 2159070091 is about 1292.4752847804.

The spelling of 2159070091 in words is "two billion, one hundred fifty-nine million, seventy thousand, ninety-one".