1723473561 has 4 divisors (see below), whose sum is σ = 2297964752. Its totient is φ = 1148982372.

The previous prime is 1723473541. The next prime is 1723473569. The reversal of 1723473561 is 1653743271.

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: 1653743271 = 3 ⋅551247757.

It is not a de Polignac number, because 1723473561 - 2⁹ = 1723473049 is a prime.

It is a super-2 number, since 2×1723473561² = 5940722230932041442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1723473569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287245591 + ... + 287245596.

It is an arithmetic number, because the mean of its divisors is an integer number (574491188).

Almost surely, 2^1723473561 is an apocalyptic number.

It is an amenable number.

1723473561 is a deficient number, since it is larger than the sum of its proper divisors (574491191).

1723473561 is an equidigital number, since it uses as much as digits as its factorization.

1723473561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574491190.

The product of its digits is 105840, while the sum is 39.

The square root of 1723473561 is about 41514.7390814395. The cubic root of 1723473561 is about 1198.9512969797.

The spelling of 1723473561 in words is "one billion, seven hundred twenty-three million, four hundred seventy-three thousand, five hundred sixty-one".