136401407 has 4 divisors (see below), whose sum is σ = 136425216. Its totient is φ = 136377600.

The previous prime is 136401389. The next prime is 136401427. The reversal of 136401407 is 704104631.

136401407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704104631 = 2293 ⋅307067.

It is a cyclic number.

It is not a de Polignac number, because 136401407 - 2¹² = 136397311 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 (136401427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2498 + ... + 16704.

It is an arithmetic number, because the mean of its divisors is an integer number (34106304).

Almost surely, 2^136401407 is an apocalyptic number.

136401407 is a deficient number, since it is larger than the sum of its proper divisors (23809).

136401407 is an equidigital number, since it uses as much as digits as its factorization.

136401407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23808.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 136401407 is about 11679.1012924797. The cubic root of 136401407 is about 514.7617674647.

The spelling of 136401407 in words is "one hundred thirty-six million, four hundred one thousand, four hundred seven".