249417247 has 8 divisors (see below), whose sum is σ = 251408000. Its totient is φ = 247434264.

The previous prime is 249417193. The next prime is 249417277. The reversal of 249417247 is 742714942.

It is a happy number.

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 249417247 - 2²³ = 241028639 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 (249417277) 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, 73768 + ... + 77074.

It is an arithmetic number, because the mean of its divisors is an integer number (31426000).

Almost surely, 2^249417247 is an apocalyptic number.

249417247 is a deficient number, since it is larger than the sum of its proper divisors (1990753).

249417247 is a wasteful number, since it uses less digits than its factorization.

249417247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885.

The product of its digits is 112896, while the sum is 40.

The square root of 249417247 is about 15792.9492812457. The cubic root of 249417247 is about 629.4706622771.

The spelling of 249417247 in words is "two hundred forty-nine million, four hundred seventeen thousand, two hundred forty-seven".