249065439 has 16 divisors (see below), whose sum is σ = 391772160. Its totient is φ = 137731680.

The previous prime is 249065423. The next prime is 249065441. The reversal of 249065439 is 934560942.

It is not a de Polignac number, because 249065439 - 2⁴ = 249065423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249065439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249065449) 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, 190644 + ... + 191945.

It is an arithmetic number, because the mean of its divisors is an integer number (24485760).

Almost surely, 2^249065439 is an apocalyptic number.

249065439 is a deficient number, since it is larger than the sum of its proper divisors (142706721).

249065439 is a wasteful number, since it uses less digits than its factorization.

249065439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382630.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 249065439 is about 15781.8072159053. The cubic root of 249065439 is about 629.1745627086.

The spelling of 249065439 in words is "two hundred forty-nine million, sixty-five thousand, four hundred thirty-nine".