1890811147 has 2 divisors, whose sum is σ = 1890811148. Its totient is φ = 1890811146.

The previous prime is 1890811129. The next prime is 1890811177. The reversal of 1890811147 is 7411180981.

It is a weak prime.

It is an emirp because it is prime and its reverse (7411180981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1890811147 - 2⁷ = 1890811019 is a prime.

It is not a weakly prime, because it can be changed into another prime (1890811127) 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, 945405573 + 945405574.

It is an arithmetic number, because the mean of its divisors is an integer number (945405574).

Almost surely, 2^1890811147 is an apocalyptic number.

1890811147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890811147 is an equidigital number, since it uses as much as digits as its factorization.

1890811147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 40.

The square root of 1890811147 is about 43483.4583146281. The cubic root of 1890811147 is about 1236.5624412694.

The spelling of 1890811147 in words is "one billion, eight hundred ninety million, eight hundred eleven thousand, one hundred forty-seven".