1243709489 has 8 divisors (see below), whose sum is σ = 1358023968. Its totient is φ = 1129603360.

The previous prime is 1243709483. The next prime is 1243709513. The reversal of 1243709489 is 9849073421.

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 1243709489 - 2²⁸ = 975274033 is a prime.

It is a super-2 number, since 2×1243709489² = 3093626586057282242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243709483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39467 + ... + 63600.

It is an arithmetic number, because the mean of its divisors is an integer number (169752996).

Almost surely, 2^1243709489 is an apocalyptic number.

It is an amenable number.

1243709489 is a deficient number, since it is larger than the sum of its proper divisors (114314479).

1243709489 is a wasteful number, since it uses less digits than its factorization.

1243709489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104175.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 1243709489 is about 35266.2655947578. The cubic root of 1243709489 is about 1075.4073059775.

The spelling of 1243709489 in words is "one billion, two hundred forty-three million, seven hundred nine thousand, four hundred eighty-nine".