8157393 has 6 divisors (see below), whose sum is σ = 11782914. Its totient is φ = 5438256.

The previous prime is 8157379. The next prime is 8157421. The reversal of 8157393 is 3937518.

8157393 is a `hidden beast` number, since 81 + 573 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8105409 + 51984 = 2847^2 + 228^2 .

It is not a de Polignac number, because 8157393 - 2⁶ = 8157329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8157313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 453180 + ... + 453197.

It is an arithmetic number, because the mean of its divisors is an integer number (1963819).

Almost surely, 2^8157393 is an apocalyptic number.

It is an amenable number.

8157393 is a deficient number, since it is larger than the sum of its proper divisors (3625521).

8157393 is a wasteful number, since it uses less digits than its factorization.

8157393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906383 (or 906380 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 8157393 is about 2856.1150186923. The cubic root of 8157393 is about 201.3030995515.

The spelling of 8157393 in words is "eight million, one hundred fifty-seven thousand, three hundred ninety-three".