257012089 has 4 divisors (see below), whose sum is σ = 259507456. Its totient is φ = 254516724.

The previous prime is 257012071. The next prime is 257012099. The reversal of 257012089 is 980210752.

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 257012089 - 2⁷ = 257011961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257012029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247529 + ... + 1247734.

It is an arithmetic number, because the mean of its divisors is an integer number (64876864).

Almost surely, 2^257012089 is an apocalyptic number.

It is an amenable number.

257012089 is a deficient number, since it is larger than the sum of its proper divisors (2495367).

257012089 is a wasteful number, since it uses less digits than its factorization.

257012089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495366.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 257012089 is about 16031.5965829982. The cubic root of 257012089 is about 635.7960867126.

The spelling of 257012089 in words is "two hundred fifty-seven million, twelve thousand, eighty-nine".