134997686 has 4 divisors (see below), whose sum is σ = 202496532. Its totient is φ = 67498842.

The previous prime is 134997661. The next prime is 134997689. The reversal of 134997686 is 686799431.

134997686 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, and also an emirpimes, since its reverse is a distinct semiprime: 686799431 = 29 ⋅23682739.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134997689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33749420 + ... + 33749423.

It is an arithmetic number, because the mean of its divisors is an integer number (50624133).

Almost surely, 2^134997686 is an apocalyptic number.

134997686 is a deficient number, since it is larger than the sum of its proper divisors (67498846).

134997686 is an equidigital number, since it uses as much as digits as its factorization.

134997686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67498845.

The product of its digits is 1959552, while the sum is 53.

The square root of 134997686 is about 11618.8504594904. The cubic root of 134997686 is about 512.9898529608.

The spelling of 134997686 in words is "one hundred thirty-four million, nine hundred ninety-seven thousand, six hundred eighty-six".