36138691 has 2 divisors, whose sum is σ = 36138692. Its totient is φ = 36138690.

The previous prime is 36138689. The next prime is 36138737. The reversal of 36138691 is 19683163.

It is a weak prime.

It is an emirp because it is prime and its reverse (19683163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36138691 - 2¹ = 36138689 is a prime.

Together with 36138689, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36138691.

It is not a weakly prime, because it can be changed into another prime (36138391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18069345 + 18069346.

It is an arithmetic number, because the mean of its divisors is an integer number (18069346).

Almost surely, 2^36138691 is an apocalyptic number.

36138691 is a deficient number, since it is larger than the sum of its proper divisors (1).

36138691 is an equidigital number, since it uses as much as digits as its factorization.

36138691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 36138691 is about 6011.5464732463. The cubic root of 36138691 is about 330.6162070767.

The spelling of 36138691 in words is "thirty-six million, one hundred thirty-eight thousand, six hundred ninety-one".