1671947 has 2 divisors, whose sum is σ = 1671948. Its totient is φ = 1671946.

The previous prime is 1671941. The next prime is 1671961. The reversal of 1671947 is 7491761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1671947 - 2¹⁰ = 1670923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1671941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835973 + 835974.

It is an arithmetic number, because the mean of its divisors is an integer number (835974).

2^1671947 is an apocalyptic number.

1671947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671947 is an equidigital number, since it uses as much as digits as its factorization.

1671947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

The square root of 1671947 is about 1293.0378958097. The cubic root of 1671947 is about 118.6881886998.

The spelling of 1671947 in words is "one million, six hundred seventy-one thousand, nine hundred forty-seven".