249284143 has 4 divisors (see below), whose sum is σ = 260122608. Its totient is φ = 238445680.

The previous prime is 249284131. The next prime is 249284149. The reversal of 249284143 is 341482942.

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-249284143 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 (249284149) 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, 5419198 + ... + 5419243.

It is an arithmetic number, because the mean of its divisors is an integer number (65030652).

Almost surely, 2^249284143 is an apocalyptic number.

249284143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

249284143 is a deficient number, since it is larger than the sum of its proper divisors (10838465).

249284143 is a wasteful number, since it uses less digits than its factorization.

249284143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10838464.

The product of its digits is 55296, while the sum is 37.

The square root of 249284143 is about 15788.7346864782. The cubic root of 249284143 is about 629.3586679213.

The spelling of 249284143 in words is "two hundred forty-nine million, two hundred eighty-four thousand, one hundred forty-three".