868257393 has 32 divisors (see below), whose sum is σ = 1222348800. Its totient is φ = 547473600.

The previous prime is 868257391. The next prime is 868257409. The reversal of 868257393 is 393752868.

It is not a de Polignac number, because 868257393 - 2¹ = 868257391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (868257391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1256178 + ... + 1256868.

It is an arithmetic number, because the mean of its divisors is an integer number (38198400).

Almost surely, 2^868257393 is an apocalyptic number.

It is an amenable number.

868257393 is a deficient number, since it is larger than the sum of its proper divisors (354091407).

868257393 is a wasteful number, since it uses less digits than its factorization.

868257393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013.

The product of its digits is 2177280, while the sum is 51.

The square root of 868257393 is about 29466.2076453690. The cubic root of 868257393 is about 954.0024645146.

The spelling of 868257393 in words is "eight hundred sixty-eight million, two hundred fifty-seven thousand, three hundred ninety-three".