1855674013 has 2 divisors, whose sum is σ = 1855674014. Its totient is φ = 1855674012.

The previous prime is 1855673957. The next prime is 1855674019. The reversal of 1855674013 is 3104765581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1640817049 + 214856964 = 40507^2 + 14658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1855674013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1855674019) 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 as a sum of consecutive naturals, namely, 927837006 + 927837007.

It is an arithmetic number, because the mean of its divisors is an integer number (927837007).

Almost surely, 2^1855674013 is an apocalyptic number.

It is an amenable number.

1855674013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1855674013 is an equidigital number, since it uses as much as digits as its factorization.

1855674013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 1855674013 is about 43077.5348992952. The cubic root of 1855674013 is about 1228.8547766833.

The spelling of 1855674013 in words is "one billion, eight hundred fifty-five million, six hundred seventy-four thousand, thirteen".