1894339649 has 2 divisors, whose sum is σ = 1894339650. Its totient is φ = 1894339648.

The previous prime is 1894339633. The next prime is 1894339679. The reversal of 1894339649 is 9469334981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1600560049 + 293779600 = 40007^2 + 17140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1894339649 - 2⁴ = 1894339633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1894339594 and 1894339603.

It is not a weakly prime, because it can be changed into another prime (1894339619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947169824 + 947169825.

It is an arithmetic number, because the mean of its divisors is an integer number (947169825).

Almost surely, 2^1894339649 is an apocalyptic number.

It is an amenable number.

1894339649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894339649 is an equidigital number, since it uses as much as digits as its factorization.

1894339649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 56.

The square root of 1894339649 is about 43524.0123265307. The cubic root of 1894339649 is about 1237.3311592797.

The spelling of 1894339649 in words is "one billion, eight hundred ninety-four million, three hundred thirty-nine thousand, six hundred forty-nine".