249378239 has 8 divisors (see below), whose sum is σ = 272256768. Its totient is φ = 226534360.

The previous prime is 249378209. The next prime is 249378247. The reversal of 249378239 is 932873942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 249378239 - 2¹² = 249374143 is a prime.

It is a super-2 number, since 2×249378239² = 124379012173482242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249378193 and 249378202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249378209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7754 + ... + 23640.

It is an arithmetic number, because the mean of its divisors is an integer number (34032096).

Almost surely, 2^249378239 is an apocalyptic number.

249378239 is a deficient number, since it is larger than the sum of its proper divisors (22878529).

249378239 is a wasteful number, since it uses less digits than its factorization.

249378239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17325.

The product of its digits is 653184, while the sum is 47.

The square root of 249378239 is about 15791.7142514674. The cubic root of 249378239 is about 629.4378448836.

The spelling of 249378239 in words is "two hundred forty-nine million, three hundred seventy-eight thousand, two hundred thirty-nine".