249432985873 has 4 divisors (see below), whose sum is σ = 251253664740. Its totient is φ = 247612307008.

The previous prime is 249432985829. The next prime is 249432985897. The reversal of 249432985873 is 378589234942.

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 111470512384 + 137962473489 = 333872^2 + 371433^2 .

It is a cyclic number.

It is not a de Polignac number, because 249432985873 - 2¹³ = 249432977681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249432985573) 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 3 ways as a sum of consecutive naturals, for example, 910339228 + ... + 910339501.

It is an arithmetic number, because the mean of its divisors is an integer number (62813416185).

Almost surely, 2^249432985873 is an apocalyptic number.

It is an amenable number.

249432985873 is a deficient number, since it is larger than the sum of its proper divisors (1820678867).

249432985873 is a wasteful number, since it uses less digits than its factorization.

249432985873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820678866.

The product of its digits is 104509440, while the sum is 64.

The spelling of 249432985873 in words is "two hundred forty-nine billion, four hundred thirty-two million, nine hundred eighty-five thousand, eight hundred seventy-three".