257925997 has 8 divisors (see below), whose sum is σ = 301628096. Its totient is φ = 215937792.

The previous prime is 257925973. The next prime is 257926013. The reversal of 257925997 is 799529752.

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

It is not a de Polignac number, because 257925997 - 2⁷ = 257925869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257925097) 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, 428148 + ... + 428749.

It is an arithmetic number, because the mean of its divisors is an integer number (37703512).

Almost surely, 2^257925997 is an apocalyptic number.

It is an amenable number.

257925997 is a deficient number, since it is larger than the sum of its proper divisors (43702099).

257925997 is an equidigital number, since it uses as much as digits as its factorization.

257925997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856947.

The product of its digits is 3572100, while the sum is 55.

The square root of 257925997 is about 16060.0746262276. The cubic root of 257925997 is about 636.5488032627.

The spelling of 257925997 in words is "two hundred fifty-seven million, nine hundred twenty-five thousand, nine hundred ninety-seven".