134891243 has 4 divisors (see below), whose sum is σ = 142826040. Its totient is φ = 126956448.

The previous prime is 134891231. The next prime is 134891249. The reversal of 134891243 is 342198431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 134891243 - 2⁶ = 134891179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134891249) 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, 3967373 + ... + 3967406.

It is an arithmetic number, because the mean of its divisors is an integer number (35706510).

Almost surely, 2^134891243 is an apocalyptic number.

134891243 is a deficient number, since it is larger than the sum of its proper divisors (7934797).

134891243 is an equidigital number, since it uses as much as digits as its factorization.

134891243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7934796.

The product of its digits is 20736, while the sum is 35.

The square root of 134891243 is about 11614.2689395416. The cubic root of 134891243 is about 512.8549900649.

The spelling of 134891243 in words is "one hundred thirty-four million, eight hundred ninety-one thousand, two hundred forty-three".