257338609 has 4 divisors (see below), whose sum is σ = 280733040. Its totient is φ = 233944180.

The previous prime is 257338597. The next prime is 257338621. The reversal of 257338609 is 906833752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (257338597) and next prime (257338621).

It is a cyclic number.

It is not a de Polignac number, because 257338609 - 2¹⁹ = 256814321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257338309) 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, 11697199 + ... + 11697220.

It is an arithmetic number, because the mean of its divisors is an integer number (70183260).

Almost surely, 2^257338609 is an apocalyptic number.

It is an amenable number.

257338609 is a deficient number, since it is larger than the sum of its proper divisors (23394431).

257338609 is a wasteful number, since it uses less digits than its factorization.

257338609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23394430.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 257338609 is about 16041.7769900968. The cubic root of 257338609 is about 636.0652209857.

The spelling of 257338609 in words is "two hundred fifty-seven million, three hundred thirty-eight thousand, six hundred nine".