1722233945 has 4 divisors (see below), whose sum is σ = 2066680740. Its totient is φ = 1377787152.

The previous prime is 1722233939. The next prime is 1722233971. The reversal of 1722233945 is 5493322271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5493322271 = 7459 ⋅736469.

It can be written as a sum of positive squares in 2 ways, for example, as 868834576 + 853399369 = 29476^2 + 29213^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722233945 - 2⁶ = 1722233881 is a prime.

It is a super-2 number, since 2×1722233945² = 5932179522620526050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1722233899 and 1722233908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172223390 + ... + 172223399.

It is an arithmetic number, because the mean of its divisors is an integer number (516670185).

Almost surely, 2^1722233945 is an apocalyptic number.

It is an amenable number.

1722233945 is a deficient number, since it is larger than the sum of its proper divisors (344446795).

1722233945 is an equidigital number, since it uses as much as digits as its factorization.

1722233945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344446794.

The product of its digits is 90720, while the sum is 38.

The square root of 1722233945 is about 41499.8065658143. The cubic root of 1722233945 is about 1198.6637776902.

The spelling of 1722233945 in words is "one billion, seven hundred twenty-two million, two hundred thirty-three thousand, nine hundred forty-five".