136781943 has 24 divisors (see below), whose sum is σ = 193240320. Its totient is φ = 86040240.

The previous prime is 136781903. The next prime is 136781959. The reversal of 136781943 is 349187631.

It is not a de Polignac number, because 136781943 - 2⁹ = 136781431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136781895 and 136781904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136781903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124828 + ... + 125918.

It is an arithmetic number, because the mean of its divisors is an integer number (8051680).

Almost surely, 2^136781943 is an apocalyptic number.

136781943 is a deficient number, since it is larger than the sum of its proper divisors (56458377).

136781943 is a wasteful number, since it uses less digits than its factorization.

136781943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219 (or 1196 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 136781943 is about 11695.3812678339. The cubic root of 136781943 is about 515.2400213383.

The spelling of 136781943 in words is "one hundred thirty-six million, seven hundred eighty-one thousand, nine hundred forty-three".