257200849 has 4 divisors (see below), whose sum is σ = 257435136. Its totient is φ = 256966564.

The previous prime is 257200807. The next prime is 257200859. The reversal of 257200849 is 948002752.

257200849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 257200849 - 2⁷ = 257200721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257200859) 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, 115489 + ... + 117694.

It is an arithmetic number, because the mean of its divisors is an integer number (64358784).

Almost surely, 2^257200849 is an apocalyptic number.

It is an amenable number.

257200849 is a deficient number, since it is larger than the sum of its proper divisors (234287).

257200849 is a wasteful number, since it uses less digits than its factorization.

257200849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234286.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 257200849 is about 16037.4826266469. The cubic root of 257200849 is about 635.9517000160.

The spelling of 257200849 in words is "two hundred fifty-seven million, two hundred thousand, eight hundred forty-nine".