257470663 has 4 divisors (see below), whose sum is σ = 258539248. Its totient is φ = 256402080.

The previous prime is 257470657. The next prime is 257470723. The reversal of 257470663 is 366074752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257470663 is a prime.

It is a super-2 number, since 2×257470663² = 132582284611319138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257470163) 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, 533931 + ... + 534412.

It is an arithmetic number, because the mean of its divisors is an integer number (64634812).

Almost surely, 2^257470663 is an apocalyptic number.

257470663 is a deficient number, since it is larger than the sum of its proper divisors (1068585).

257470663 is a wasteful number, since it uses less digits than its factorization.

257470663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068584.

The product of its (nonzero) digits is 211680, while the sum is 40.

The square root of 257470663 is about 16045.8924027304. The cubic root of 257470663 is about 636.1740019076.

It can be divided in two parts, 2574 and 70663, that added together give a palindrome (73237).

The spelling of 257470663 in words is "two hundred fifty-seven million, four hundred seventy thousand, six hundred sixty-three".