136699427 has 4 divisors (see below), whose sum is σ = 136906896. Its totient is φ = 136491960.

The previous prime is 136699403. The next prime is 136699441. The reversal of 136699427 is 724996631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136699427 - 2¹⁰ = 136698403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136699447) 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, 102743 + ... + 104064.

It is an arithmetic number, because the mean of its divisors is an integer number (34226724).

Almost surely, 2^136699427 is an apocalyptic number.

136699427 is a deficient number, since it is larger than the sum of its proper divisors (207469).

136699427 is an equidigital number, since it uses as much as digits as its factorization.

136699427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207468.

The product of its digits is 489888, while the sum is 47.

The square root of 136699427 is about 11691.8530182345. The cubic root of 136699427 is about 515.1363914367.

The spelling of 136699427 in words is "one hundred thirty-six million, six hundred ninety-nine thousand, four hundred twenty-seven".