8138287 has 4 divisors (see below), whose sum is σ = 8202496. Its totient is φ = 8074080.

The previous prime is 8138279. The next prime is 8138323. The reversal of 8138287 is 7828318.

8138287 is digitally balanced in base 3, 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.

It is a cyclic number.

It is not a de Polignac number, because 8138287 - 2³ = 8138279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8138227) 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, 31914 + ... + 32167.

It is an arithmetic number, because the mean of its divisors is an integer number (2050624).

Almost surely, 2^8138287 is an apocalyptic number.

8138287 is a deficient number, since it is larger than the sum of its proper divisors (64209).

8138287 is a wasteful number, since it uses less digits than its factorization.

8138287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64208.

The product of its digits is 21504, while the sum is 37.

The square root of 8138287 is about 2852.7683046473. The cubic root of 8138287 is about 201.1458146742.

The spelling of 8138287 in words is "eight million, one hundred thirty-eight thousand, two hundred eighty-seven".