249742337 has 4 divisors (see below), whose sum is σ = 268953300. Its totient is φ = 230531376.

The previous prime is 249742313. The next prime is 249742379. The reversal of 249742337 is 733247942.

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 167857936 + 81884401 = 12956^2 + 9049^2 .

It is a cyclic number.

It is not a de Polignac number, because 249742337 - 2⁸ = 249742081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249742294 and 249742303.

It is not an unprimeable number, because it can be changed into a prime (249742037) 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, 9605462 + ... + 9605487.

It is an arithmetic number, because the mean of its divisors is an integer number (67238325).

Almost surely, 2^249742337 is an apocalyptic number.

It is an amenable number.

249742337 is a deficient number, since it is larger than the sum of its proper divisors (19210963).

249742337 is a wasteful number, since it uses less digits than its factorization.

249742337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19210962.

The product of its digits is 254016, while the sum is 41.

The square root of 249742337 is about 15803.2381808286. The cubic root of 249742337 is about 629.7440271941.

The spelling of 249742337 in words is "two hundred forty-nine million, seven hundred forty-two thousand, three hundred thirty-seven".