1667473 has 2 divisors, whose sum is σ = 1667474. Its totient is φ = 1667472.

The previous prime is 1667461. The next prime is 1667489. The reversal of 1667473 is 3747661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1046529 + 620944 = 1023^2 + 788^2 .

It is a cyclic number.

It is not a de Polignac number, because 1667473 - 2⁵ = 1667441 is a prime.

1667473 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1667423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833736 + 833737.

It is an arithmetic number, because the mean of its divisors is an integer number (833737).

2^1667473 is an apocalyptic number.

It is an amenable number.

1667473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667473 is an equidigital number, since it uses as much as digits as its factorization.

1667473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 34.

The square root of 1667473 is about 1291.3067025304. The cubic root of 1667473 is about 118.5822273446.

The spelling of 1667473 in words is "one million, six hundred sixty-seven thousand, four hundred seventy-three".