257834149 has 4 divisors (see below), whose sum is σ = 263830336. Its totient is φ = 251837964.

The previous prime is 257834141. The next prime is 257834153. The reversal of 257834149 is 941438752.

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 a cyclic number.

It is not a de Polignac number, because 257834149 - 2³ = 257834141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 5996143 = 257834149 / (2 + 5 + 7 + 8 + 3 + 4 + 1 + 4 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257834141) 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, 2998029 + ... + 2998114.

It is an arithmetic number, because the mean of its divisors is an integer number (65957584).

Almost surely, 2^257834149 is an apocalyptic number.

It is an amenable number.

257834149 is a deficient number, since it is larger than the sum of its proper divisors (5996187).

257834149 is an equidigital number, since it uses as much as digits as its factorization.

257834149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5996186.

The product of its digits is 241920, while the sum is 43.

The square root of 257834149 is about 16057.2148581253. The cubic root of 257834149 is about 636.4732354946.

The spelling of 257834149 in words is "two hundred fifty-seven million, eight hundred thirty-four thousand, one hundred forty-nine".