1854680749 has 2 divisors, whose sum is σ = 1854680750. Its totient is φ = 1854680748.

The previous prime is 1854680713. The next prime is 1854680767. The reversal of 1854680749 is 9470864581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1660970025 + 193710724 = 40755^2 + 13918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1854680749 - 2⁷ = 1854680621 is a prime.

It is a super-2 number, since 2×1854680749² = 6879681361422402002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1854680696 and 1854680705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1854980749) 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, 927340374 + 927340375.

It is an arithmetic number, because the mean of its divisors is an integer number (927340375).

Almost surely, 2^1854680749 is an apocalyptic number.

It is an amenable number.

1854680749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1854680749 is an equidigital number, since it uses as much as digits as its factorization.

1854680749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The square root of 1854680749 is about 43066.0045627639. The cubic root of 1854680749 is about 1228.6354861826.

The spelling of 1854680749 in words is "one billion, eight hundred fifty-four million, six hundred eighty thousand, seven hundred forty-nine".