8138291 has 8 divisors (see below), whose sum is σ = 9848160. Its totient is φ = 6565248.

The previous prime is 8138279. The next prime is 8138323. The reversal of 8138291 is 1928318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8138291 - 2⁶ = 8138227 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8138201) 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 7 ways as a sum of consecutive naturals, for example, 34076 + ... + 34313.

It is an arithmetic number, because the mean of its divisors is an integer number (1231020).

Almost surely, 2^8138291 is an apocalyptic number.

8138291 is a deficient number, since it is larger than the sum of its proper divisors (1709869).

8138291 is a wasteful number, since it uses less digits than its factorization.

8138291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68413.

The product of its digits is 3456, while the sum is 32.

The square root of 8138291 is about 2852.7690057206. The cubic root of 8138291 is about 201.1458476289.

It can be divided in two parts, 8 and 138291, that multiplied together give a triangular number (1106328 = T₁₄₈₇).

The spelling of 8138291 in words is "eight million, one hundred thirty-eight thousand, two hundred ninety-one".