257743423 has 8 divisors (see below), whose sum is σ = 294953120. Its totient is φ = 220631040.

The previous prime is 257743403. The next prime is 257743429. The reversal of 257743423 is 324347752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257743423 - 2²¹ = 255646271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257743429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18558 + ... + 29323.

It is an arithmetic number, because the mean of its divisors is an integer number (36869140).

Almost surely, 2^257743423 is an apocalyptic number.

257743423 is a deficient number, since it is larger than the sum of its proper divisors (37209697).

257743423 is an equidigital number, since it uses as much as digits as its factorization.

257743423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48657.

The product of its digits is 141120, while the sum is 37.

The square root of 257743423 is about 16054.3895243637. The cubic root of 257743423 is about 636.3985732291.

The spelling of 257743423 in words is "two hundred fifty-seven million, seven hundred forty-three thousand, four hundred twenty-three".