257193903 has 8 divisors (see below), whose sum is σ = 343028608. Its totient is φ = 171410904.

The previous prime is 257193869. The next prime is 257193929. The reversal of 257193903 is 309391752.

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

It is not a de Polignac number, because 257193903 - 2¹⁰ = 257192879 is a prime.

It is a super-2 number, since 2×257193903² = 132297407480746818, 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 (257193973) 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, 750 + ... + 22692.

It is an arithmetic number, because the mean of its divisors is an integer number (42878576).

Almost surely, 2^257193903 is an apocalyptic number.

257193903 is a deficient number, since it is larger than the sum of its proper divisors (85834705).

257193903 is a wasteful number, since it uses less digits than its factorization.

257193903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25853.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 257193903 is about 16037.2660700008. The cubic root of 257193903 is about 635.9459750993.

The spelling of 257193903 in words is "two hundred fifty-seven million, one hundred ninety-three thousand, nine hundred three".