257944667 has 4 divisors (see below), whose sum is σ = 258056736. Its totient is φ = 257832600.

The previous prime is 257944639. The next prime is 257944669. The reversal of 257944667 is 766449752.

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 257944667 - 2¹⁴ = 257928283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257944669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52508 + ... + 57209.

It is an arithmetic number, because the mean of its divisors is an integer number (64514184).

Almost surely, 2^257944667 is an apocalyptic number.

257944667 is a deficient number, since it is larger than the sum of its proper divisors (112069).

257944667 is a wasteful number, since it uses less digits than its factorization.

257944667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112068.

The product of its digits is 2540160, while the sum is 50.

The square root of 257944667 is about 16060.6558707918. The cubic root of 257944667 is about 636.5641617758.

The spelling of 257944667 in words is "two hundred fifty-seven million, nine hundred forty-four thousand, six hundred sixty-seven".