1791486149 has 2 divisors, whose sum is σ = 1791486150. Its totient is φ = 1791486148.

The previous prime is 1791486131. The next prime is 1791486161. The reversal of 1791486149 is 9416841971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1062108100 + 729378049 = 32590^2 + 27007^2 .

It is an emirp because it is prime and its reverse (9416841971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1791486149 - 2²⁴ = 1774708933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1791486097 and 1791486106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1791486199) 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, 895743074 + 895743075.

It is an arithmetic number, because the mean of its divisors is an integer number (895743075).

Almost surely, 2^1791486149 is an apocalyptic number.

It is an amenable number.

1791486149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1791486149 is an equidigital number, since it uses as much as digits as its factorization.

1791486149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The square root of 1791486149 is about 42325.9512474321. The cubic root of 1791486149 is about 1214.5194798629.

The spelling of 1791486149 in words is "one billion, seven hundred ninety-one million, four hundred eighty-six thousand, one hundred forty-nine".