134020823 has 4 divisors (see below), whose sum is σ = 134577168. Its totient is φ = 133464480.

The previous prime is 134020811. The next prime is 134020849. The reversal of 134020823 is 328020431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328020431 = 2579 ⋅127189.

It is a cyclic number.

It is not a de Polignac number, because 134020823 - 2¹⁰ = 134019799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134020853) 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, 277811 + ... + 278292.

It is an arithmetic number, because the mean of its divisors is an integer number (33644292).

Almost surely, 2^134020823 is an apocalyptic number.

134020823 is a deficient number, since it is larger than the sum of its proper divisors (556345).

134020823 is an equidigital number, since it uses as much as digits as its factorization.

134020823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556344.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 134020823 is about 11576.7362844629. The cubic root of 134020823 is about 511.7494998057.

The spelling of 134020823 in words is "one hundred thirty-four million, twenty thousand, eight hundred twenty-three".