249936427 has 4 divisors (see below), whose sum is σ = 269162320. Its totient is φ = 230710536.

The previous prime is 249936391. The next prime is 249936481. The reversal of 249936427 is 724639942.

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

It is a cyclic number.

It is not a de Polignac number, because 249936427 - 2¹⁹ = 249412139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249933427) 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, 9612927 + ... + 9612952.

It is an arithmetic number, because the mean of its divisors is an integer number (67290580).

Almost surely, 2^249936427 is an apocalyptic number.

249936427 is a deficient number, since it is larger than the sum of its proper divisors (19225893).

249936427 is a wasteful number, since it uses less digits than its factorization.

249936427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19225892.

The product of its digits is 653184, while the sum is 46.

The square root of 249936427 is about 15809.3778182445. The cubic root of 249936427 is about 629.9071224466.

The spelling of 249936427 in words is "two hundred forty-nine million, nine hundred thirty-six thousand, four hundred twenty-seven".