1868947 has 2 divisors, whose sum is σ = 1868948. Its totient is φ = 1868946.

The previous prime is 1868917. The next prime is 1868983. The reversal of 1868947 is 7498681.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1868947 is a prime.

1868947 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1868917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934473 + 934474.

It is an arithmetic number, because the mean of its divisors is an integer number (934474).

2^1868947 is an apocalyptic number.

1868947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868947 is an equidigital number, since it uses as much as digits as its factorization.

1868947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 1868947 is about 1367.0943639705. The cubic root of 1868947 is about 123.1777674997.

The spelling of 1868947 in words is "one million, eight hundred sixty-eight thousand, nine hundred forty-seven".