1809362741 has 4 divisors (see below), whose sum is σ = 1810681932. Its totient is φ = 1808043552.

The previous prime is 1809362629. The next prime is 1809362749. The reversal of 1809362741 is 1472639081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1660888516 + 148474225 = 40754^2 + 12185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1809362741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1809362749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657536 + ... + 660281.

It is an arithmetic number, because the mean of its divisors is an integer number (452670483).

Almost surely, 2^1809362741 is an apocalyptic number.

It is an amenable number.

1809362741 is a deficient number, since it is larger than the sum of its proper divisors (1319191).

1809362741 is a wasteful number, since it uses less digits than its factorization.

1809362741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319190.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1809362741 is about 42536.6047187596. The cubic root of 1809362741 is about 1218.5458669251.

The spelling of 1809362741 in words is "one billion, eight hundred nine million, three hundred sixty-two thousand, seven hundred forty-one".