67543489 has 4 divisors (see below), whose sum is σ = 72739156. Its totient is φ = 62347824.

The previous prime is 67543477. The next prime is 67543501. The reversal of 67543489 is 98434576.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (67543477) and next prime (67543501).

It can be written as a sum of positive squares in 2 ways, for example, as 12531600 + 55011889 = 3540^2 + 7417^2 .

It is a cyclic number.

It is not a de Polignac number, because 67543489 - 2⁹ = 67542977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67543789) 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, 2597814 + ... + 2597839.

It is an arithmetic number, because the mean of its divisors is an integer number (18184789).

Almost surely, 2^67543489 is an apocalyptic number.

It is an amenable number.

67543489 is a deficient number, since it is larger than the sum of its proper divisors (5195667).

67543489 is a wasteful number, since it uses less digits than its factorization.

67543489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5195666.

The product of its digits is 725760, while the sum is 46.

The square root of 67543489 is about 8218.4845926728. The cubic root of 67543489 is about 407.2500661669.

The spelling of 67543489 in words is "sixty-seven million, five hundred forty-three thousand, four hundred eighty-nine".