1854605749 has 2 divisors, whose sum is σ = 1854605750. Its totient is φ = 1854605748.

The previous prime is 1854605741. The next prime is 1854605791. The reversal of 1854605749 is 9475064581.

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., 1546848900 + 307756849 = 39330^2 + 17543^2 .

It is an emirp because it is prime and its reverse (9475064581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1854605749 - 2³ = 1854605741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1854605741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 927302874 + 927302875.

It is an arithmetic number, because the mean of its divisors is an integer number (927302875).

Almost surely, 2^1854605749 is an apocalyptic number.

It is an amenable number.

1854605749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1854605749 is an equidigital number, since it uses as much as digits as its factorization.

1854605749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 1854605749 is about 43065.1337975397. The cubic root of 1854605749 is about 1228.6189246794.

The spelling of 1854605749 in words is "one billion, eight hundred fifty-four million, six hundred five thousand, seven hundred forty-nine".