257613463 has 4 divisors (see below), whose sum is σ = 257677200. Its totient is φ = 257549728.

The previous prime is 257613451. The next prime is 257613469. The reversal of 257613463 is 364316752.

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-257613463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257613469) 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 3 ways as a sum of consecutive naturals, for example, 25363 + ... + 34036.

It is an arithmetic number, because the mean of its divisors is an integer number (64419300).

Almost surely, 2^257613463 is an apocalyptic number.

257613463 is a deficient number, since it is larger than the sum of its proper divisors (63737).

257613463 is an equidigital number, since it uses as much as digits as its factorization.

257613463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63736.

The product of its digits is 90720, while the sum is 37.

The square root of 257613463 is about 16050.3415228462. The cubic root of 257613463 is about 636.2915931139.

The spelling of 257613463 in words is "two hundred fifty-seven million, six hundred thirteen thousand, four hundred sixty-three".