249294711823 has 4 divisors (see below), whose sum is σ = 249483429808. Its totient is φ = 249105993840.

The previous prime is 249294711797. The next prime is 249294711829. The reversal of 249294711823 is 328117492942.

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

It is a cyclic number.

It is not a de Polignac number, because 249294711823 - 2¹³ = 249294703631 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 (249294711829) 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, 94357011 + ... + 94359652.

It is an arithmetic number, because the mean of its divisors is an integer number (62370857452).

Almost surely, 2^249294711823 is an apocalyptic number.

249294711823 is a deficient number, since it is larger than the sum of its proper divisors (188717985).

249294711823 is a wasteful number, since it uses less digits than its factorization.

249294711823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188717984.

The product of its digits is 1741824, while the sum is 52.

The spelling of 249294711823 in words is "two hundred forty-nine billion, two hundred ninety-four million, seven hundred eleven thousand, eight hundred twenty-three".