249672143 has 4 divisors (see below), whose sum is σ = 285339600. Its totient is φ = 214004688.

The previous prime is 249672113. The next prime is 249672161. The reversal of 249672143 is 341276942.

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 249672143 - 2⁸ = 249671887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249672097 and 249672106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249672113) 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, 17833718 + ... + 17833731.

It is an arithmetic number, because the mean of its divisors is an integer number (71334900).

Almost surely, 2^249672143 is an apocalyptic number.

249672143 is a deficient number, since it is larger than the sum of its proper divisors (35667457).

249672143 is an equidigital number, since it uses as much as digits as its factorization.

249672143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35667456.

The product of its digits is 72576, while the sum is 38.

The square root of 249672143 is about 15801.0171508039. The cubic root of 249672143 is about 629.6850218544.

The spelling of 249672143 in words is "two hundred forty-nine million, six hundred seventy-two thousand, one hundred forty-three".