136942543 has 2 divisors, whose sum is σ = 136942544. Its totient is φ = 136942542.

The previous prime is 136942523. The next prime is 136942549. The reversal of 136942543 is 345249631.

136942543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136942543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136942549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68471271 + 68471272.

It is an arithmetic number, because the mean of its divisors is an integer number (68471272).

Almost surely, 2^136942543 is an apocalyptic number.

136942543 is a deficient number, since it is larger than the sum of its proper divisors (1).

136942543 is an equidigital number, since it uses as much as digits as its factorization.

136942543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 37.

The square root of 136942543 is about 11702.2452119241. The cubic root of 136942543 is about 515.4415956622.

The spelling of 136942543 in words is "one hundred thirty-six million, nine hundred forty-two thousand, five hundred forty-three".