1667073 has 4 divisors (see below), whose sum is σ = 2222768. Its totient is φ = 1111380.

The previous prime is 1667053. The next prime is 1667077. The reversal of 1667073 is 3707661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3707661 = 3 ⋅1235887.

It is not a de Polignac number, because 1667073 - 2¹² = 1662977 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1667073.

It is not an unprimeable number, because it can be changed into a prime (1667077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277843 + ... + 277848.

It is an arithmetic number, because the mean of its divisors is an integer number (555692).

It is a Proth number, since it is equal to 407 ⋅ 2¹² + 1 and 407 < 2¹².

2^1667073 is an apocalyptic number.

It is an amenable number.

1667073 is a deficient number, since it is larger than the sum of its proper divisors (555695).

1667073 is an equidigital number, since it uses as much as digits as its factorization.

1667073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555694.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 1667073 is about 1291.1518113684. The cubic root of 1667073 is about 118.5727445955.

The spelling of 1667073 in words is "one million, six hundred sixty-seven thousand, seventy-three".