249390442843 has 4 divisors (see below), whose sum is σ = 256130725120. Its totient is φ = 242650160568.

The previous prime is 249390442811. The next prime is 249390442849. The reversal of 249390442843 is 348244093942.

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 249390442843 - 2⁵ = 249390442811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249390442849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3370141083 + ... + 3370141156.

It is an arithmetic number, because the mean of its divisors is an integer number (64032681280).

Almost surely, 2^249390442843 is an apocalyptic number.

249390442843 is a deficient number, since it is larger than the sum of its proper divisors (6740282277).

249390442843 is an equidigital number, since it uses as much as digits as its factorization.

249390442843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740282276.

The product of its (nonzero) digits is 5971968, while the sum is 52.

The spelling of 249390442843 in words is "two hundred forty-nine billion, three hundred ninety million, four hundred forty-two thousand, eight hundred forty-three".