36139291 has 4 divisors (see below), whose sum is σ = 36170584. Its totient is φ = 36108000.

The previous prime is 36139289. The next prime is 36139303. The reversal of 36139291 is 19293163.

36139291 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 an emirpimes, since its reverse is a distinct semiprime: 19293163 = 1087 ⋅17749.

It is a cyclic number.

It is not a de Polignac number, because 36139291 - 2¹ = 36139289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36139091) 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 3 ways as a sum of consecutive naturals, for example, 13845 + ... + 16246.

It is an arithmetic number, because the mean of its divisors is an integer number (9042646).

Almost surely, 2^36139291 is an apocalyptic number.

36139291 is a deficient number, since it is larger than the sum of its proper divisors (31293).

36139291 is a wasteful number, since it uses less digits than its factorization.

36139291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31292.

The product of its digits is 8748, while the sum is 34.

The square root of 36139291 is about 6011.5963770034. The cubic root of 36139291 is about 330.6180367743.

The spelling of 36139291 in words is "thirty-six million, one hundred thirty-nine thousand, two hundred ninety-one".