136670405 has 8 divisors (see below), whose sum is σ = 164280984. Its totient is φ = 109152000.

The previous prime is 136670371. The next prime is 136670423. The reversal of 136670405 is 504076631.

It can be written as a sum of positive squares in 4 ways, for example, as 4351396 + 132319009 = 2086^2 + 11503^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-136670405 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 19736 + ... + 25745.

It is an arithmetic number, because the mean of its divisors is an integer number (20535123).

Almost surely, 2^136670405 is an apocalyptic number.

It is an amenable number.

136670405 is a deficient number, since it is larger than the sum of its proper divisors (27610579).

136670405 is an equidigital number, since it uses as much as digits as its factorization.

136670405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46087.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 136670405 is about 11690.6118317221. The cubic root of 136670405 is about 515.0999334773.

The spelling of 136670405 in words is "one hundred thirty-six million, six hundred seventy thousand, four hundred five".