1851094243 has 2 divisors, whose sum is σ = 1851094244. Its totient is φ = 1851094242.

The previous prime is 1851094183. The next prime is 1851094279. The reversal of 1851094243 is 3424901581.

It is a strong prime.

It is an emirp because it is prime and its reverse (3424901581) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1851094243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1851094643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925547121 + 925547122.

It is an arithmetic number, because the mean of its divisors is an integer number (925547122).

Almost surely, 2^1851094243 is an apocalyptic number.

1851094243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1851094243 is an equidigital number, since it uses as much as digits as its factorization.

1851094243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1851094243 is about 43024.3447713036. The cubic root of 1851094243 is about 1227.8430134123.

The spelling of 1851094243 in words is "one billion, eight hundred fifty-one million, ninety-four thousand, two hundred forty-three".