136187293 has 4 divisors (see below), whose sum is σ = 148567968. Its totient is φ = 123806620.

The previous prime is 136187287. The next prime is 136187297. The reversal of 136187293 is 392781631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 392781631 = 11 ⋅35707421.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136187293 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 (136187297) 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, 6190321 + ... + 6190342.

It is an arithmetic number, because the mean of its divisors is an integer number (37141992).

Almost surely, 2^136187293 is an apocalyptic number.

It is an amenable number.

136187293 is a deficient number, since it is larger than the sum of its proper divisors (12380675).

136187293 is a wasteful number, since it uses less digits than its factorization.

136187293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12380674.

The product of its digits is 54432, while the sum is 40.

The square root of 136187293 is about 11669.9311480402. The cubic root of 136187293 is about 514.4922799652.

The spelling of 136187293 in words is "one hundred thirty-six million, one hundred eighty-seven thousand, two hundred ninety-three".