1671973 has 4 divisors (see below), whose sum is σ = 1674988. Its totient is φ = 1668960.

The previous prime is 1671961. The next prime is 1671977. The reversal of 1671973 is 3791761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3791761 = 151 ⋅25111.

It can be written as a sum of positive squares in 2 ways, for example, as 1399489 + 272484 = 1183^2 + 522^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671973 - 2⁵ = 1671941 is a prime.

It is a Duffinian number.

1671973 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408 + ... + 1873.

It is an arithmetic number, because the mean of its divisors is an integer number (418747).

2^1671973 is an apocalyptic number.

It is an amenable number.

1671973 is a deficient number, since it is larger than the sum of its proper divisors (3015).

1671973 is an equidigital number, since it uses as much as digits as its factorization.

1671973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014.

The product of its digits is 7938, while the sum is 34.

The square root of 1671973 is about 1293.0479496136. The cubic root of 1671973 is about 118.6888039260.

The spelling of 1671973 in words is "one million, six hundred seventy-one thousand, nine hundred seventy-three".