1879992091 has 2 divisors, whose sum is σ = 1879992092. Its totient is φ = 1879992090.

The previous prime is 1879992047. The next prime is 1879992109. The reversal of 1879992091 is 1902999781.

Together with next prime (1879992109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1879992091 - 2²⁷ = 1745774363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1879992691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 939996045 + 939996046.

It is an arithmetic number, because the mean of its divisors is an integer number (939996046).

Almost surely, 2^1879992091 is an apocalyptic number.

1879992091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1879992091 is an equidigital number, since it uses as much as digits as its factorization.

1879992091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 55.

The square root of 1879992091 is about 43358.8755735201. The cubic root of 1879992091 is about 1234.1994278265.

The spelling of 1879992091 in words is "one billion, eight hundred seventy-nine million, nine hundred ninety-two thousand, ninety-one".