257063487 has 4 divisors (see below), whose sum is σ = 342751320. Its totient is φ = 171375656.

The previous prime is 257063467. The next prime is 257063497. The reversal of 257063487 is 784360752.

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

It is a cyclic number.

It is not a de Polignac number, because 257063487 - 2⁶ = 257063423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257063467) 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, 42843912 + ... + 42843917.

It is an arithmetic number, because the mean of its divisors is an integer number (85687830).

Almost surely, 2^257063487 is an apocalyptic number.

257063487 is a deficient number, since it is larger than the sum of its proper divisors (85687833).

257063487 is an equidigital number, since it uses as much as digits as its factorization.

257063487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85687832.

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 257063487 is about 16033.1995247362. The cubic root of 257063487 is about 635.8384666505.

The spelling of 257063487 in words is "two hundred fifty-seven million, sixty-three thousand, four hundred eighty-seven".