136904 has 16 divisors (see below), whose sum is σ = 260700. Its totient is φ = 67392.

The previous prime is 136897. The next prime is 136943. The reversal of 136904 is 409631.

Added to its reverse (409631) it gives a triangular number (546535 = T₁₀₄₅).

It can be written as a sum of positive squares in 2 ways, for example, as 136900 + 4 = 370^2 + 2^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 136904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794 + ... + 950.

2¹³⁶⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

136904 is a deficient number, since it is larger than the sum of its proper divisors (123796).

136904 is a wasteful number, since it uses less digits than its factorization.

136904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 136904 is about 370.0054053659. The cubic root of 136904 is about 51.5393233458.

Adding to 136904 its reverse (409631), we get a triangular number (546535 = T₁₀₄₅).

The spelling of 136904 in words is "one hundred thirty-six thousand, nine hundred four".