136939 has 8 divisors (see below), whose sum is σ = 152640. Its totient is φ = 121800.

The previous prime is 136897. The next prime is 136943. The reversal of 136939 is 939631.

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

It is a cyclic number.

It is not a de Polignac number, because 136939 - 2⁷ = 136811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136939.

It is not an unprimeable number, because it can be changed into a prime (136949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544 + ... + 754.

It is an arithmetic number, because the mean of its divisors is an integer number (19080).

2¹³⁶⁹³⁹ is an apocalyptic number.

136939 is a deficient number, since it is larger than the sum of its proper divisors (15701).

136939 is a wasteful number, since it uses less digits than its factorization.

136939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281.

The product of its digits is 4374, while the sum is 31.

The square root of 136939 is about 370.0526989498. The cubic root of 136939 is about 51.5437150427.

The spelling of 136939 in words is "one hundred thirty-six thousand, nine hundred thirty-nine".