249378843 has 16 divisors (see below), whose sum is σ = 380254976. Its totient is φ = 142408800.

The previous prime is 249378841. The next prime is 249378869. The reversal of 249378843 is 348873942.

It is not a de Polignac number, because 249378843 - 2¹ = 249378841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249378792 and 249378801.

It is not an unprimeable number, because it can be changed into a prime (249378841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40893 + ... + 46593.

It is an arithmetic number, because the mean of its divisors is an integer number (23765936).

Almost surely, 2^249378843 is an apocalyptic number.

249378843 is a deficient number, since it is larger than the sum of its proper divisors (130876133).

249378843 is a wasteful number, since it uses less digits than its factorization.

249378843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7794.

The product of its digits is 1161216, while the sum is 48.

The square root of 249378843 is about 15791.7333754088. The cubic root of 249378843 is about 629.4383530543.

The spelling of 249378843 in words is "two hundred forty-nine million, three hundred seventy-eight thousand, eight hundred forty-three".