1723264145 has 4 divisors (see below), whose sum is σ = 2067916980. Its totient is φ = 1378611312.

The previous prime is 1723264133. The next prime is 1723264229. The reversal of 1723264145 is 5414623271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5414623271 = 521 ⋅10392751.

It can be written as a sum of positive squares in 2 ways, for example, as 693110929 + 1030153216 = 26327^2 + 32096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1723264145 is a prime.

It is an unprimeable number.

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, 172326410 + ... + 172326419.

It is an arithmetic number, because the mean of its divisors is an integer number (516979245).

Almost surely, 2^1723264145 is an apocalyptic number.

It is an amenable number.

1723264145 is a deficient number, since it is larger than the sum of its proper divisors (344652835).

1723264145 is an equidigital number, since it uses as much as digits as its factorization.

1723264145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344652834.

The product of its digits is 40320, while the sum is 35.

The square root of 1723264145 is about 41512.2168162578. The cubic root of 1723264145 is about 1198.9027342476.

The spelling of 1723264145 in words is "one billion, seven hundred twenty-three million, two hundred sixty-four thousand, one hundred forty-five".