249279039 has 20 divisors (see below), whose sum is σ = 376230624. Its totient is φ = 164467584.

The previous prime is 249278999. The next prime is 249279053. The reversal of 249279039 is 930972942.

It is a de Polignac number, because none of the positive numbers 2^k-249279039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249278985 and 249279003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249279739) 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 in 19 ways as a sum of consecutive naturals, for example, 8007 + ... + 23720.

Almost surely, 2^249279039 is an apocalyptic number.

249279039 is a deficient number, since it is larger than the sum of its proper divisors (126951585).

249279039 is an equidigital number, since it uses as much as digits as its factorization.

249279039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31836 (or 31827 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 249279039 is about 15788.5730514192. The cubic root of 249279039 is about 629.3543725972.

The spelling of 249279039 in words is "two hundred forty-nine million, two hundred seventy-nine thousand, thirty-nine".