257693871 has 8 divisors (see below), whose sum is σ = 363803184. Its totient is φ = 161690240.

The previous prime is 257693833. The next prime is 257693879. The reversal of 257693871 is 178396752.

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

It is a cyclic number.

It is not a de Polignac number, because 257693871 - 2¹³ = 257685679 is a prime.

It is a super-2 number, since 2×257693871² = 132812262301929282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257693871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257693879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2526360 + ... + 2526461.

It is an arithmetic number, because the mean of its divisors is an integer number (45475398).

Almost surely, 2^257693871 is an apocalyptic number.

257693871 is a deficient number, since it is larger than the sum of its proper divisors (106109313).

257693871 is a wasteful number, since it uses less digits than its factorization.

257693871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5052841.

The product of its digits is 635040, while the sum is 48.

The square root of 257693871 is about 16052.8461962357. The cubic root of 257693871 is about 636.3577873927.

The spelling of 257693871 in words is "two hundred fifty-seven million, six hundred ninety-three thousand, eight hundred seventy-one".