1672109 has 4 divisors (see below), whose sum is σ = 1726080. Its totient is φ = 1618140.

The previous prime is 1672091. The next prime is 1672117. The reversal of 1672109 is 9012761.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1672109 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672129) 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, 26939 + ... + 27000.

It is an arithmetic number, because the mean of its divisors is an integer number (431520).

2^1672109 is an apocalyptic number.

It is an amenable number.

1672109 is a deficient number, since it is larger than the sum of its proper divisors (53971).

1672109 is an equidigital number, since it uses as much as digits as its factorization.

1672109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53970.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1672109 is about 1293.1005374680. The cubic root of 1672109 is about 118.6920219284.

The spelling of 1672109 in words is "one million, six hundred seventy-two thousand, one hundred nine".