136669538 has 8 divisors (see below), whose sum is σ = 206045532. Its totient is φ = 67987696.

The previous prime is 136669529. The next prime is 136669573. The reversal of 136669538 is 835966631.

It can be written as a sum of positive squares in 2 ways, for example, as 91336249 + 45333289 = 9557^2 + 6733^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 136669492 and 136669501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173045 + ... + 173832.

Almost surely, 2^136669538 is an apocalyptic number.

136669538 is a deficient number, since it is larger than the sum of its proper divisors (69375994).

136669538 is a wasteful number, since it uses less digits than its factorization.

136669538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347076.

The product of its digits is 699840, while the sum is 47.

The square root of 136669538 is about 11690.5747506271. The cubic root of 136669538 is about 515.0988442569.

The spelling of 136669538 in words is "one hundred thirty-six million, six hundred sixty-nine thousand, five hundred thirty-eight".