136233661 has 4 divisors (see below), whose sum is σ = 136261692. Its totient is φ = 136205632.

The previous prime is 136233649. The next prime is 136233689. The reversal of 136233661 is 166332631.

136233661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166332631 = 19 ⋅8754349.

It can be written as a sum of positive squares in 2 ways, for example, as 86601636 + 49632025 = 9306^2 + 7045^2 .

It is a cyclic number.

It is not a de Polignac number, because 136233661 - 2⁷ = 136233533 is a prime.

It is a super-2 number, since 2×136233661² = 37119220778925842, 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 (136233061) 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, 4630 + ... + 17143.

It is an arithmetic number, because the mean of its divisors is an integer number (34065423).

Almost surely, 2^136233661 is an apocalyptic number.

It is an amenable number.

136233661 is a deficient number, since it is larger than the sum of its proper divisors (28031).

136233661 is an equidigital number, since it uses as much as digits as its factorization.

136233661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28030.

The product of its digits is 11664, while the sum is 31.

The square root of 136233661 is about 11671.9176230815. The cubic root of 136233661 is about 514.5506634619.

The spelling of 136233661 in words is "one hundred thirty-six million, two hundred thirty-three thousand, six hundred sixty-one".