249831742 has 4 divisors (see below), whose sum is σ = 374747616. Its totient is φ = 124915870.

The previous prime is 249831739. The next prime is 249831793. The reversal of 249831742 is 247138942.

249831742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 249831695 and 249831704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62457934 + ... + 62457937.

It is an arithmetic number, because the mean of its divisors is an integer number (93686904).

Almost surely, 2^249831742 is an apocalyptic number.

249831742 is a deficient number, since it is larger than the sum of its proper divisors (124915874).

249831742 is a wasteful number, since it uses less digits than its factorization.

249831742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124915873.

The product of its digits is 96768, while the sum is 40.

The square root of 249831742 is about 15806.0666201304. The cubic root of 249831742 is about 629.8191653655.

The spelling of 249831742 in words is "two hundred forty-nine million, eight hundred thirty-one thousand, seven hundred forty-two".