1874542409 has 2 divisors, whose sum is σ = 1874542410. Its totient is φ = 1874542408.

The previous prime is 1874542403. The next prime is 1874542447. The reversal of 1874542409 is 9042454781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998560000 + 875982409 = 31600^2 + 29597^2 .

It is an emirp because it is prime and its reverse (9042454781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1874542409 - 2⁴ = 1874542393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1874542409.

It is not a weakly prime, because it can be changed into another prime (1874542403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 937271204 + 937271205.

It is an arithmetic number, because the mean of its divisors is an integer number (937271205).

Almost surely, 2^1874542409 is an apocalyptic number.

It is an amenable number.

1874542409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1874542409 is an equidigital number, since it uses as much as digits as its factorization.

1874542409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 1874542409 is about 43295.9860610658. The cubic root of 1874542409 is about 1233.0057164305.

The spelling of 1874542409 in words is "one billion, eight hundred seventy-four million, five hundred forty-two thousand, four hundred nine".