134866391 has 4 divisors (see below), whose sum is σ = 147126984. Its totient is φ = 122605800.

The previous prime is 134866387. The next prime is 134866393. The reversal of 134866391 is 193668431.

134866391 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.

It is a cyclic number.

It is not a de Polignac number, because 134866391 - 2² = 134866387 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 (134866393) 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, 6130280 + ... + 6130301.

It is an arithmetic number, because the mean of its divisors is an integer number (36781746).

Almost surely, 2^134866391 is an apocalyptic number.

134866391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

134866391 is a deficient number, since it is larger than the sum of its proper divisors (12260593).

134866391 is a wasteful number, since it uses less digits than its factorization.

134866391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12260592.

The product of its digits is 93312, while the sum is 41.

The square root of 134866391 is about 11613.1989994144. The cubic root of 134866391 is about 512.8234924555.

The spelling of 134866391 in words is "one hundred thirty-four million, eight hundred sixty-six thousand, three hundred ninety-one".