134686391 has 8 divisors (see below), whose sum is σ = 154477344. Its totient is φ = 115032960.

The previous prime is 134686381. The next prime is 134686397. The reversal of 134686391 is 193686431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 134686391 - 2¹⁸ = 134424247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134686397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32270 + ... + 36203.

It is an arithmetic number, because the mean of its divisors is an integer number (19309668).

Almost surely, 2^134686391 is an apocalyptic number.

134686391 is a deficient number, since it is larger than the sum of its proper divisors (19790953).

134686391 is an equidigital number, since it uses as much as digits as its factorization.

134686391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68761.

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

The square root of 134686391 is about 11605.4466092434. The cubic root of 134686391 is about 512.5952435321.

The spelling of 134686391 in words is "one hundred thirty-four million, six hundred eighty-six thousand, three hundred ninety-one".