1722124897 has 4 divisors (see below), whose sum is σ = 1722214656. Its totient is φ = 1722035140.

The previous prime is 1722124891. The next prime is 1722124909. The reversal of 1722124897 is 7984212271.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7984212271 = 7 ⋅1140601753.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1722124897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1722124891) 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, 3193 + ... + 58774.

It is an arithmetic number, because the mean of its divisors is an integer number (430553664).

Almost surely, 2^1722124897 is an apocalyptic number.

It is an amenable number.

1722124897 is a deficient number, since it is larger than the sum of its proper divisors (89759).

1722124897 is an equidigital number, since it uses as much as digits as its factorization.

1722124897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89758.

The product of its digits is 112896, while the sum is 43.

The square root of 1722124897 is about 41498.4927075671. The cubic root of 1722124897 is about 1198.6384782534.

The spelling of 1722124897 in words is "one billion, seven hundred twenty-two million, one hundred twenty-four thousand, eight hundred ninety-seven".