249379247 has 8 divisors (see below), whose sum is σ = 271027680. Its totient is φ = 228083040.

The previous prime is 249379217. The next prime is 249379259. The reversal of 249379247 is 742973942.

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 249379247 - 2⁶ = 249379183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249379217) 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 7 ways as a sum of consecutive naturals, for example, 86579 + ... + 89412.

It is an arithmetic number, because the mean of its divisors is an integer number (33878460).

Almost surely, 2^249379247 is an apocalyptic number.

249379247 is a deficient number, since it is larger than the sum of its proper divisors (21648433).

249379247 is a wasteful number, since it uses less digits than its factorization.

249379247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176113.

The product of its digits is 762048, while the sum is 47.

The square root of 249379247 is about 15791.7461669063. The cubic root of 249379247 is about 629.4386929561.

The spelling of 249379247 in words is "two hundred forty-nine million, three hundred seventy-nine thousand, two hundred forty-seven".