1722499009 has 35 divisors (see below), whose sum is σ = 2210523985. Its totient is φ = 1342207020.

The previous prime is 1722498977. The next prime is 1722499013. The reversal of 1722499009 is 9009942271.

The square root of 1722499009 is 41503.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1722499009 - 2⁵ = 1722498977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1722499039) by changing a digit.

It is a polite number, since it can be written in 34 ways as a sum of consecutive naturals, for example, 156590814 + ... + 156590824.

Almost surely, 2^1722499009 is an apocalyptic number.

1722499009 is the 41503-rd square number.

1722499009 is the 20752-nd centered octagonal number.

It is an amenable number.

1722499009 is a deficient number, since it is larger than the sum of its proper divisors (488024976).

1722499009 is an frugal number, since it uses more digits than its factorization.

1722499009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The cubic root of 1722499009 is about 1198.7252688169.

The spelling of 1722499009 in words is "one billion, seven hundred twenty-two million, four hundred ninety-nine thousand, nine".