136568069 has 4 divisors (see below), whose sum is σ = 148983360. Its totient is φ = 124152780.

The previous prime is 136568027. The next prime is 136568077. The reversal of 136568069 is 960865631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 960865631 = 11 ⋅87351421.

It is a cyclic number.

It is not a de Polignac number, because 136568069 - 2¹⁶ = 136502533 is a prime.

It is a super-2 number, since 2×136568069² = 37301674940777522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136568669) 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, 6207629 + ... + 6207650.

It is an arithmetic number, because the mean of its divisors is an integer number (37245840).

Almost surely, 2^136568069 is an apocalyptic number.

It is an amenable number.

136568069 is a deficient number, since it is larger than the sum of its proper divisors (12415291).

136568069 is a wasteful number, since it uses less digits than its factorization.

136568069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12415290.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 136568069 is about 11686.2341667451. The cubic root of 136568069 is about 514.9713359482.

The spelling of 136568069 in words is "one hundred thirty-six million, five hundred sixty-eight thousand, sixty-nine".