1894492849 has 2 divisors, whose sum is σ = 1894492850. Its totient is φ = 1894492848.

The previous prime is 1894492837. The next prime is 1894492879. The reversal of 1894492849 is 9482944981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1235030449 + 659462400 = 35143^2 + 25680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1894492849 - 2¹⁹ = 1893968561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1894492793 and 1894492802.

It is not a weakly prime, because it can be changed into another prime (1894492879) 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, 947246424 + 947246425.

It is an arithmetic number, because the mean of its divisors is an integer number (947246425).

Almost surely, 2^1894492849 is an apocalyptic number.

It is an amenable number.

1894492849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894492849 is an equidigital number, since it uses as much as digits as its factorization.

1894492849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5971968, while the sum is 58.

The square root of 1894492849 is about 43525.7722389850. The cubic root of 1894492849 is about 1237.3645137389.

The spelling of 1894492849 in words is "one billion, eight hundred ninety-four million, four hundred ninety-two thousand, eight hundred forty-nine".