1880968891 has 2 divisors, whose sum is σ = 1880968892. Its totient is φ = 1880968890.

The previous prime is 1880968883. The next prime is 1880968937. The reversal of 1880968891 is 1988690881.

It is a weak prime.

It is an emirp because it is prime and its reverse (1988690881) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1688960881 and 1880698861.

It is a cyclic number.

It is not a de Polignac number, because 1880968891 - 2³ = 1880968883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1880968841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940484445 + 940484446.

It is an arithmetic number, because the mean of its divisors is an integer number (940484446).

Almost surely, 2^1880968891 is an apocalyptic number.

1880968891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1880968891 is an equidigital number, since it uses as much as digits as its factorization.

1880968891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 58.

The square root of 1880968891 is about 43370.1382404991. The cubic root of 1880968891 is about 1234.4131445530.

The spelling of 1880968891 in words is "one billion, eight hundred eighty million, nine hundred sixty-eight thousand, eight hundred ninety-one".