1679123573 has 4 divisors (see below), whose sum is σ = 1697990220. Its totient is φ = 1660256928.

The previous prime is 1679123569. The next prime is 1679123597. The reversal of 1679123573 is 3753219761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168013444 + 1511110129 = 12962^2 + 38873^2 .

It is a cyclic number.

It is not a de Polignac number, because 1679123573 - 2² = 1679123569 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679123543) 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, 9433190 + ... + 9433367.

It is an arithmetic number, because the mean of its divisors is an integer number (424497555).

Almost surely, 2^1679123573 is an apocalyptic number.

It is an amenable number.

1679123573 is a deficient number, since it is larger than the sum of its proper divisors (18866647).

1679123573 is an equidigital number, since it uses as much as digits as its factorization.

1679123573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18866646.

The product of its digits is 238140, while the sum is 44.

The square root of 1679123573 is about 40977.1103544406. The cubic root of 1679123573 is about 1188.5776318290.

The spelling of 1679123573 in words is "one billion, six hundred seventy-nine million, one hundred twenty-three thousand, five hundred seventy-three".