249295439 has 2 divisors, whose sum is σ = 249295440. Its totient is φ = 249295438.

The previous prime is 249295399. The next prime is 249295451. The reversal of 249295439 is 934592942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249295439 - 2²⁰ = 248246863 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 249295393 and 249295402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249295139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124647719 + 124647720.

It is an arithmetic number, because the mean of its divisors is an integer number (124647720).

Almost surely, 2^249295439 is an apocalyptic number.

249295439 is a deficient number, since it is larger than the sum of its proper divisors (1).

249295439 is an equidigital number, since it uses as much as digits as its factorization.

249295439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 47.

The square root of 249295439 is about 15789.0924058351. The cubic root of 249295439 is about 629.3681739787.

The spelling of 249295439 in words is "two hundred forty-nine million, two hundred ninety-five thousand, four hundred thirty-nine".