134645891 has 4 divisors (see below), whose sum is σ = 136542384. Its totient is φ = 132749400.

The previous prime is 134645881. The next prime is 134645897. The reversal of 134645891 is 198546431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198546431 = 2731 ⋅72701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134645891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134645897) 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, 948140 + ... + 948281.

It is an arithmetic number, because the mean of its divisors is an integer number (34135596).

Almost surely, 2^134645891 is an apocalyptic number.

134645891 is a deficient number, since it is larger than the sum of its proper divisors (1896493).

134645891 is an equidigital number, since it uses as much as digits as its factorization.

134645891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896492.

The product of its digits is 103680, while the sum is 41.

The square root of 134645891 is about 11603.7016076768. The cubic root of 134645891 is about 512.5438595024.

The spelling of 134645891 in words is "one hundred thirty-four million, six hundred forty-five thousand, eight hundred ninety-one".