1672917 has 4 divisors (see below), whose sum is σ = 2230560. Its totient is φ = 1115276.

The previous prime is 1672901. The next prime is 1672921. The reversal of 1672917 is 7192761.

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: 7192761 = 3 ⋅2397587.

It is a cyclic number.

It is not a de Polignac number, because 1672917 - 2⁴ = 1672901 is a prime.

It is a D-number.

1672917 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278817 + ... + 278822.

It is an arithmetic number, because the mean of its divisors is an integer number (557640).

2^1672917 is an apocalyptic number.

It is an amenable number.

1672917 is a deficient number, since it is larger than the sum of its proper divisors (557643).

1672917 is an equidigital number, since it uses as much as digits as its factorization.

1672917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557642.

The product of its digits is 5292, while the sum is 33.

The square root of 1672917 is about 1293.4129271041. The cubic root of 1672917 is about 118.7111370520.

The spelling of 1672917 in words is "one million, six hundred seventy-two thousand, nine hundred seventeen".