257340097 has 4 divisors (see below), whose sum is σ = 294102976. Its totient is φ = 220577220.

The previous prime is 257340091. The next prime is 257340119. The reversal of 257340097 is 790043752.

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 257340097 - 2⁷ = 257339969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257340091) 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, 18381429 + ... + 18381442.

It is an arithmetic number, because the mean of its divisors is an integer number (73525744).

Almost surely, 2^257340097 is an apocalyptic number.

It is an amenable number.

257340097 is a deficient number, since it is larger than the sum of its proper divisors (36762879).

257340097 is an equidigital number, since it uses as much as digits as its factorization.

257340097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36762878.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 257340097 is about 16041.8233689316. The cubic root of 257340097 is about 636.0664469492.

The spelling of 257340097 in words is "two hundred fifty-seven million, three hundred forty thousand, ninety-seven".