1890125191 has 2 divisors, whose sum is σ = 1890125192. Its totient is φ = 1890125190.

The previous prime is 1890125189. The next prime is 1890125201. The reversal of 1890125191 is 1915210981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1890125191 - 2¹ = 1890125189 is a prime.

Together with 1890125189, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1890125191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1890125791) 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 as a sum of consecutive naturals, namely, 945062595 + 945062596.

It is an arithmetic number, because the mean of its divisors is an integer number (945062596).

Almost surely, 2^1890125191 is an apocalyptic number.

1890125191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890125191 is an equidigital number, since it uses as much as digits as its factorization.

1890125191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 37.

The square root of 1890125191 is about 43475.5700480166. The cubic root of 1890125191 is about 1236.4128881667.

The spelling of 1890125191 in words is "one billion, eight hundred ninety million, one hundred twenty-five thousand, one hundred ninety-one".