2179423091 has 2 divisors, whose sum is σ = 2179423092. Its totient is φ = 2179423090.

The previous prime is 2179423087. The next prime is 2179423157. The reversal of 2179423091 is 1903249712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2179423091 - 2² = 2179423087 is a prime.

It is not a weakly prime, because it can be changed into another prime (2179423991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089711545 + 1089711546.

It is an arithmetic number, because the mean of its divisors is an integer number (1089711546).

Almost surely, 2^2179423091 is an apocalyptic number.

2179423091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2179423091 is an equidigital number, since it uses as much as digits as its factorization.

2179423091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2179423091 is about 46684.2916943162. The cubic root of 2179423091 is about 1296.5238673294.

The spelling of 2179423091 in words is "two billion, one hundred seventy-nine million, four hundred twenty-three thousand, ninety-one".