257489011 has 8 divisors (see below), whose sum is σ = 278286624. Its totient is φ = 236832960.

The previous prime is 257489009. The next prime is 257489017. The reversal of 257489011 is 110984752.

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

It is not a de Polignac number, because 257489011 - 2¹ = 257489009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257489017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31591 + ... + 38896.

It is an arithmetic number, because the mean of its divisors is an integer number (34785828).

Almost surely, 2^257489011 is an apocalyptic number.

257489011 is a deficient number, since it is larger than the sum of its proper divisors (20797613).

257489011 is a wasteful number, since it uses less digits than its factorization.

257489011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70781.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 257489011 is about 16046.4641276513. The cubic root of 257489011 is about 636.1891133294.

The spelling of 257489011 in words is "two hundred fifty-seven million, four hundred eighty-nine thousand, eleven".