1850999641 has 2 divisors, whose sum is σ = 1850999642. Its totient is φ = 1850999640.

The previous prime is 1850999597. The next prime is 1850999659. The reversal of 1850999641 is 1469990581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1526855625 + 324144016 = 39075^2 + 18004^2 .

It is a cyclic number.

It is not a de Polignac number, because 1850999641 - 2¹³ = 1850991449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1850999041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925499820 + 925499821.

It is an arithmetic number, because the mean of its divisors is an integer number (925499821).

Almost surely, 2^1850999641 is an apocalyptic number.

It is an amenable number.

1850999641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850999641 is an equidigital number, since it uses as much as digits as its factorization.

1850999641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 52.

The square root of 1850999641 is about 43023.2453564349. The cubic root of 1850999641 is about 1227.8220963459.

The spelling of 1850999641 in words is "one billion, eight hundred fifty million, nine hundred ninety-nine thousand, six hundred forty-one".