134623661 has 4 divisors (see below), whose sum is σ = 134793372. Its totient is φ = 134453952.

The previous prime is 134623631. The next prime is 134623667. The reversal of 134623661 is 166326431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166326431 = 293 ⋅567667.

It can be written as a sum of positive squares in 2 ways, for example, as 57078025 + 77545636 = 7555^2 + 8806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134623661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134623667) by changing a digit.

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, 83660 + ... + 85253.

It is an arithmetic number, because the mean of its divisors is an integer number (33698343).

Almost surely, 2^134623661 is an apocalyptic number.

It is an amenable number.

134623661 is a deficient number, since it is larger than the sum of its proper divisors (169711).

134623661 is an equidigital number, since it uses as much as digits as its factorization.

134623661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169710.

The product of its digits is 15552, while the sum is 32.

The square root of 134623661 is about 11602.7436841464. The cubic root of 134623661 is about 512.5156509993.

The spelling of 134623661 in words is "one hundred thirty-four million, six hundred twenty-three thousand, six hundred sixty-one".