1894729 has 2 divisors, whose sum is σ = 1894730. Its totient is φ = 1894728.

The previous prime is 1894727. The next prime is 1894741. The reversal of 1894729 is 9274981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1750329 + 144400 = 1323^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 1894729 - 2¹ = 1894727 is a prime.

Together with 1894727, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1894691 and 1894700.

It is not a weakly prime, because it can be changed into another prime (1894727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947364 + 947365.

It is an arithmetic number, because the mean of its divisors is an integer number (947365).

2^1894729 is an apocalyptic number.

It is an amenable number.

1894729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894729 is an equidigital number, since it uses as much as digits as its factorization.

1894729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 1894729 is about 1376.4915546417. The cubic root of 1894729 is about 123.7415924635.

The spelling of 1894729 in words is "one million, eight hundred ninety-four thousand, seven hundred twenty-nine".