1722249089 has 4 divisors (see below), whose sum is σ = 1878817200. Its totient is φ = 1565680980.

The previous prime is 1722249047. The next prime is 1722249103. The reversal of 1722249089 is 9809422271.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1722249089 is a prime.

It is a super-2 number, since 2×1722249089² = 5932283849122659842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1722240089) 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, 78284039 + ... + 78284060.

It is an arithmetic number, because the mean of its divisors is an integer number (469704300).

Almost surely, 2^1722249089 is an apocalyptic number.

It is an amenable number.

1722249089 is a deficient number, since it is larger than the sum of its proper divisors (156568111).

1722249089 is a wasteful number, since it uses less digits than its factorization.

1722249089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156568110.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1722249089 is about 41499.9890240949. The cubic root of 1722249089 is about 1198.6672910555.

The spelling of 1722249089 in words is "one billion, seven hundred twenty-two million, two hundred forty-nine thousand, eighty-nine".