136943249 has 8 divisors (see below), whose sum is σ = 141989160. Its totient is φ = 131918976.

The previous prime is 136943207. The next prime is 136943263. The reversal of 136943249 is 942349631.

It can be written as a sum of positive squares in 4 ways, for example, as 61340224 + 75603025 = 7832^2 + 8695^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136943249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136943299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8087 + ... + 18419.

It is an arithmetic number, because the mean of its divisors is an integer number (17748645).

Almost surely, 2^136943249 is an apocalyptic number.

It is an amenable number.

136943249 is a deficient number, since it is larger than the sum of its proper divisors (5045911).

136943249 is a wasteful number, since it uses less digits than its factorization.

136943249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10819.

The product of its digits is 139968, while the sum is 41.

The square root of 136943249 is about 11702.2753770367. The cubic root of 136943249 is about 515.4424814379.

The spelling of 136943249 in words is "one hundred thirty-six million, nine hundred forty-three thousand, two hundred forty-nine".