134686719 has 20 divisors (see below), whose sum is σ = 204504520. Its totient is φ = 88315920.

The previous prime is 134686711. The next prime is 134686751. The reversal of 134686719 is 917686431.

It is a happy number.

It is not a de Polignac number, because 134686719 - 2³ = 134686711 is a prime.

It is a super-2 number, since 2×134686719² = 36281024549969922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134686711) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8689 + ... + 18570.

It is an arithmetic number, because the mean of its divisors is an integer number (10225226).

Almost surely, 2^134686719 is an apocalyptic number.

134686719 is a deficient number, since it is larger than the sum of its proper divisors (69817801).

134686719 is an equidigital number, since it uses as much as digits as its factorization.

134686719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27332 (or 27323 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 134686719 is about 11605.4607405307. The cubic root of 134686719 is about 512.5956596373.

The spelling of 134686719 in words is "one hundred thirty-four million, six hundred eighty-six thousand, seven hundred nineteen".