1849120789 has 2 divisors, whose sum is σ = 1849120790. Its totient is φ = 1849120788.

The previous prime is 1849120747. The next prime is 1849120817. The reversal of 1849120789 is 9870219481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1778055889 + 71064900 = 42167^2 + 8430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1849120789 - 2²³ = 1840732181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1849120709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 924560394 + 924560395.

It is an arithmetic number, because the mean of its divisors is an integer number (924560395).

Almost surely, 2^1849120789 is an apocalyptic number.

It is an amenable number.

1849120789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1849120789 is an equidigital number, since it uses as much as digits as its factorization.

1849120789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 1849120789 is about 43001.4045003184. The cubic root of 1849120789 is about 1227.4065232457.

The spelling of 1849120789 in words is "one billion, eight hundred forty-nine million, one hundred twenty thousand, seven hundred eighty-nine".