257489077 has 8 divisors (see below), whose sum is σ = 263200896. Its totient is φ = 251787072.

The previous prime is 257489033. The next prime is 257489081. The reversal of 257489077 is 770984752.

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 257489077 - 2¹⁹ = 256964789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257489077.

It is a congruent 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, 81978 + ... + 85060.

It is an arithmetic number, because the mean of its divisors is an integer number (32900112).

Almost surely, 2^257489077 is an apocalyptic number.

It is an amenable number.

257489077 is a deficient number, since it is larger than the sum of its proper divisors (5711819).

257489077 is a wasteful number, since it uses less digits than its factorization.

257489077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4907.

The product of its (nonzero) digits is 987840, while the sum is 49.

The square root of 257489077 is about 16046.4661841790. The cubic root of 257489077 is about 636.1891676857.

The spelling of 257489077 in words is "two hundred fifty-seven million, four hundred eighty-nine thousand, seventy-seven".