257870077 has 4 divisors (see below), whose sum is σ = 258155296. Its totient is φ = 257584860.

The previous prime is 257870029. The next prime is 257870111. The reversal of 257870077 is 770078752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257870077 - 2⁷ = 257869949 is a prime.

It is a super-2 number, since 2×257870077² = 132993953223971858, 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 (257870017) 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 3 ways as a sum of consecutive naturals, for example, 141249 + ... + 143062.

It is an arithmetic number, because the mean of its divisors is an integer number (64538824).

Almost surely, 2^257870077 is an apocalyptic number.

It is an amenable number.

257870077 is a deficient number, since it is larger than the sum of its proper divisors (285219).

257870077 is an equidigital number, since it uses as much as digits as its factorization.

257870077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285218.

The product of its (nonzero) digits is 192080, while the sum is 43.

The square root of 257870077 is about 16058.3335685867. Note that the first 3 decimals coincide. The cubic root of 257870077 is about 636.5027973253.

The spelling of 257870077 in words is "two hundred fifty-seven million, eight hundred seventy thousand, seventy-seven".