249385485317 has 4 divisors (see below), whose sum is σ = 250172190636. Its totient is φ = 248598780000.

The previous prime is 249385485311. The next prime is 249385485329. The reversal of 249385485317 is 713584583942.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35584672321 + 213800812996 = 188639^2 + 462386^2 .

It is a cyclic number.

It is not a de Polignac number, because 249385485317 - 2¹² = 249385481221 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 (249385485311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393352184 + ... + 393352817.

It is an arithmetic number, because the mean of its divisors is an integer number (62543047659).

Almost surely, 2^249385485317 is an apocalyptic number.

It is an amenable number.

249385485317 is a deficient number, since it is larger than the sum of its proper divisors (786705319).

249385485317 is an equidigital number, since it uses as much as digits as its factorization.

249385485317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786705318.

The product of its digits is 29030400, while the sum is 59.

The spelling of 249385485317 in words is "two hundred forty-nine billion, three hundred eighty-five million, four hundred eighty-five thousand, three hundred seventeen".