249183667489 has 3 divisors (see below), whose sum is σ = 249184166673. Its totient is φ = 249183168306.

The previous prime is 249183667471. The next prime is 249183667493. The reversal of 249183667489 is 984766381942.

The square root of 249183667489 is 499183.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 249183667489 - 2⁵ = 249183667457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249183667429) 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 2 ways as a sum of consecutive naturals, for example, 249592 + ... + 748774.

It is an arithmetic number, because the mean of its divisors is an integer number (83061388891).

Almost surely, 2^249183667489 is an apocalyptic number.

249183667489 is the 499183-rd square number.

249183667489 is the 249592-nd centered octagonal number.

It is an amenable number.

249183667489 is a deficient number, since it is larger than the sum of its proper divisors (499184).

249183667489 is an frugal number, since it uses more digits than its factorization.

249183667489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998366 (or 499183 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 67.

The spelling of 249183667489 in words is "two hundred forty-nine billion, one hundred eighty-three million, six hundred sixty-seven thousand, four hundred eighty-nine".