134278691 has 4 divisors (see below), whose sum is σ = 135467112. Its totient is φ = 133090272.

The previous prime is 134278673. The next prime is 134278709. The reversal of 134278691 is 196872431.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (134278673) and next prime (134278709).

It is a cyclic number.

It is not a de Polignac number, because 134278691 - 2²² = 130084387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (134278601) 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, 594041 + ... + 594266.

It is an arithmetic number, because the mean of its divisors is an integer number (33866778).

Almost surely, 2^134278691 is an apocalyptic number.

134278691 is a deficient number, since it is larger than the sum of its proper divisors (1188421).

134278691 is a wasteful number, since it uses less digits than its factorization.

134278691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188420.

The product of its digits is 72576, while the sum is 41.

The square root of 134278691 is about 11587.8682681501. The cubic root of 134278691 is about 512.0775067295.

The spelling of 134278691 in words is "one hundred thirty-four million, two hundred seventy-eight thousand, six hundred ninety-one".