136424689 has 4 divisors (see below), whose sum is σ = 137020660. Its totient is φ = 135828720.

The previous prime is 136424669. The next prime is 136424699. The reversal of 136424689 is 986424631.

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: 986424631 = 5639 ⋅174929.

It can be written as a sum of positive squares in 2 ways, for example, as 120560400 + 15864289 = 10980^2 + 3983^2 .

It is a cyclic number.

It is not a de Polignac number, because 136424689 - 2⁹ = 136424177 is a prime.

It is a super-2 number, since 2×136424689² = 37223391537493442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136424669) 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, 297642 + ... + 298099.

It is an arithmetic number, because the mean of its divisors is an integer number (34255165).

Almost surely, 2^136424689 is an apocalyptic number.

It is an amenable number.

136424689 is a deficient number, since it is larger than the sum of its proper divisors (595971).

136424689 is an equidigital number, since it uses as much as digits as its factorization.

136424689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595970.

The product of its digits is 248832, while the sum is 43.

The square root of 136424689 is about 11680.0979876027. The cubic root of 136424689 is about 514.7910535791.

The spelling of 136424689 in words is "one hundred thirty-six million, four hundred twenty-four thousand, six hundred eighty-nine".