134778907 has 12 divisors (see below), whose sum is σ = 143653896. Its totient is φ = 126425600.

The previous prime is 134778893. The next prime is 134778911. The reversal of 134778907 is 709877431.

It is not a de Polignac number, because 134778907 - 2⁷ = 134778779 is a prime.

It is a super-2 number, since 2×134778907² = 36330707544229298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134778967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115308 + ... + 116470.

It is an arithmetic number, because the mean of its divisors is an integer number (11971158).

Almost surely, 2^134778907 is an apocalyptic number.

134778907 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

134778907 is a deficient number, since it is larger than the sum of its proper divisors (8874989).

134778907 is a wasteful number, since it uses less digits than its factorization.

134778907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 134778907 is about 11609.4318121086. The cubic root of 134778907 is about 512.7125837895.

The spelling of 134778907 in words is "one hundred thirty-four million, seven hundred seventy-eight thousand, nine hundred seven".