1722287489 has 8 divisors (see below), whose sum is σ = 1864094400. Its totient is φ = 1581812496.

The previous prime is 1722287443. The next prime is 1722287531. The reversal of 1722287489 is 9847822271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1722287489 - 2⁸ = 1722287233 is a prime.

It is a super-3 number, since 3×1722287489³ (a number of 29 digits) contains 333 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 (1722287419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330287 + ... + 335460.

It is an arithmetic number, because the mean of its divisors is an integer number (233011800).

Almost surely, 2^1722287489 is an apocalyptic number.

It is an amenable number.

1722287489 is a deficient number, since it is larger than the sum of its proper divisors (141806911).

1722287489 is a wasteful number, since it uses less digits than its factorization.

1722287489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665959.

The product of its digits is 903168, while the sum is 50.

The square root of 1722287489 is about 41500.4516722409. The cubic root of 1722287489 is about 1198.6761996550.

The spelling of 1722287489 in words is "one billion, seven hundred twenty-two million, two hundred eighty-seven thousand, four hundred eighty-nine".