1842736549 has 2 divisors, whose sum is σ = 1842736550. Its totient is φ = 1842736548.

The previous prime is 1842736547. The next prime is 1842736583. The reversal of 1842736549 is 9456372481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1424534049 + 418202500 = 37743^2 + 20450^2 .

It is an emirp because it is prime and its reverse (9456372481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1842736549 - 2¹ = 1842736547 is a prime.

Together with 1842736547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1842736547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921368274 + 921368275.

It is an arithmetic number, because the mean of its divisors is an integer number (921368275).

Almost surely, 2^1842736549 is an apocalyptic number.

It is an amenable number.

1842736549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1842736549 is an equidigital number, since it uses as much as digits as its factorization.

1842736549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The square root of 1842736549 is about 42927.1073914840. The cubic root of 1842736549 is about 1225.9923208104.

The spelling of 1842736549 in words is "one billion, eight hundred forty-two million, seven hundred thirty-six thousand, five hundred forty-nine".