136409961 has 8 divisors (see below), whose sum is σ = 182011104. Its totient is φ = 90874400.

The previous prime is 136409929. The next prime is 136410017. The reversal of 136409961 is 169904631.

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 136409961 - 2⁵ = 136409929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136409261) 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, 11316 + ... + 20021.

It is an arithmetic number, because the mean of its divisors is an integer number (22751388).

Almost surely, 2^136409961 is an apocalyptic number.

It is an amenable number.

136409961 is a deficient number, since it is larger than the sum of its proper divisors (45601143).

136409961 is a wasteful number, since it uses less digits than its factorization.

136409961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32791.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 136409961 is about 11679.4674964229. The cubic root of 136409961 is about 514.7725278134.

The spelling of 136409961 in words is "one hundred thirty-six million, four hundred nine thousand, nine hundred sixty-one".