249903239 has 2 divisors, whose sum is σ = 249903240. Its totient is φ = 249903238.

The previous prime is 249903223. The next prime is 249903253. The reversal of 249903239 is 932309942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249903239 - 2⁴ = 249903223 is a prime.

It is a super-2 number, since 2×249903239² = 124903257725382242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 249903196 and 249903205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249903209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124951619 + 124951620.

It is an arithmetic number, because the mean of its divisors is an integer number (124951620).

Almost surely, 2^249903239 is an apocalyptic number.

249903239 is a deficient number, since it is larger than the sum of its proper divisors (1).

249903239 is an equidigital number, since it uses as much as digits as its factorization.

249903239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 249903239 is about 15808.3281532235. The cubic root of 249903239 is about 629.8792403125.

The spelling of 249903239 in words is "two hundred forty-nine million, nine hundred three thousand, two hundred thirty-nine".