249969481399 has 4 divisors (see below), whose sum is σ = 272693979720. Its totient is φ = 227244983080.

The previous prime is 249969481393. The next prime is 249969481403. The reversal of 249969481399 is 993184969942.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249969481399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249969481393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11362249144 + ... + 11362249165.

It is an arithmetic number, because the mean of its divisors is an integer number (68173494930).

Almost surely, 2^249969481399 is an apocalyptic number.

249969481399 is a deficient number, since it is larger than the sum of its proper divisors (22724498321).

249969481399 is a wasteful number, since it uses less digits than its factorization.

249969481399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22724498320.

The product of its digits is 272097792, while the sum is 73.

The spelling of 249969481399 in words is "two hundred forty-nine billion, nine hundred sixty-nine million, four hundred eighty-one thousand, three hundred ninety-nine".