136920865 has 8 divisors (see below), whose sum is σ = 166757760. Its totient is φ = 107901552.

The previous prime is 136920841. The next prime is 136920913. The reversal of 136920865 is 568029631.

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 136920865 - 2¹⁹ = 136396577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204025 + ... + 204694.

It is an arithmetic number, because the mean of its divisors is an integer number (20844720).

Almost surely, 2^136920865 is an apocalyptic number.

It is an amenable number.

136920865 is a deficient number, since it is larger than the sum of its proper divisors (29836895).

136920865 is an equidigital number, since it uses as much as digits as its factorization.

136920865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408791.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 136920865 is about 11701.3189427517. The cubic root of 136920865 is about 515.4143960977.

The spelling of 136920865 in words is "one hundred thirty-six million, nine hundred twenty thousand, eight hundred sixty-five".