249392123 has 2 divisors, whose sum is σ = 249392124. Its totient is φ = 249392122.

The previous prime is 249392113. The next prime is 249392137. The reversal of 249392123 is 321293942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249392123 - 2⁴ = 249392107 is a prime.

It is not a weakly prime, because it can be changed into another prime (249392113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124696061 + 124696062.

It is an arithmetic number, because the mean of its divisors is an integer number (124696062).

Almost surely, 2^249392123 is an apocalyptic number.

249392123 is a deficient number, since it is larger than the sum of its proper divisors (1).

249392123 is an equidigital number, since it uses as much as digits as its factorization.

249392123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 249392123 is about 15792.1538429690. The cubic root of 249392123 is about 629.4495258719.

The spelling of 249392123 in words is "two hundred forty-nine million, three hundred ninety-two thousand, one hundred twenty-three".