249243407 has 8 divisors (see below), whose sum is σ = 285532800. Its totient is φ = 213124824.

The previous prime is 249243391. The next prime is 249243413. The reversal of 249243407 is 704342942.

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 249243407 - 2⁴ = 249243391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249243427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39557 + ... + 45422.

It is an arithmetic number, because the mean of its divisors is an integer number (35691600).

Almost surely, 2^249243407 is an apocalyptic number.

249243407 is a deficient number, since it is larger than the sum of its proper divisors (36289393).

249243407 is an equidigital number, since it uses as much as digits as its factorization.

249243407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85405.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 249243407 is about 15787.4446000612. Note that the first 3 decimals coincide. The cubic root of 249243407 is about 629.3243844847.

The spelling of 249243407 in words is "two hundred forty-nine million, two hundred forty-three thousand, four hundred seven".