136409407 has 4 divisors (see below), whose sum is σ = 136611576. Its totient is φ = 136207240.

The previous prime is 136409401. The next prime is 136409423. The reversal of 136409407 is 704904631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704904631 = 8117 ⋅86843.

It is a cyclic number.

It is not a de Polignac number, because 136409407 - 2⁷ = 136409279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136409401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100069 + ... + 101422.

It is an arithmetic number, because the mean of its divisors is an integer number (34152894).

Almost surely, 2^136409407 is an apocalyptic number.

136409407 is a deficient number, since it is larger than the sum of its proper divisors (202169).

136409407 is an equidigital number, since it uses as much as digits as its factorization.

136409407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202168.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 136409407 is about 11679.4437795642. The cubic root of 136409407 is about 514.7718309328.

The spelling of 136409407 in words is "one hundred thirty-six million, four hundred nine thousand, four hundred seven".