1850299109 has 2 divisors, whose sum is σ = 1850299110. Its totient is φ = 1850299108.

The previous prime is 1850299103. The next prime is 1850299111. The reversal of 1850299109 is 9019920581.

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., 1268428225 + 581870884 = 35615^2 + 24122^2 .

It is a cyclic number.

It is not a de Polignac number, because 1850299109 - 2²⁸ = 1581863653 is a prime.

Together with 1850299111, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1850299109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1850299103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925149554 + 925149555.

It is an arithmetic number, because the mean of its divisors is an integer number (925149555).

Almost surely, 2^1850299109 is an apocalyptic number.

It is an amenable number.

1850299109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850299109 is an equidigital number, since it uses as much as digits as its factorization.

1850299109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 1850299109 is about 43015.1032661785. The cubic root of 1850299109 is about 1227.6671823594.

The spelling of 1850299109 in words is "one billion, eight hundred fifty million, two hundred ninety-nine thousand, one hundred nine".