134428139 has 6 divisors (see below), whose sum is σ = 135588156. Its totient is φ = 133270280.

The previous prime is 134428117. The next prime is 134428171. The reversal of 134428139 is 931824431.

It is a de Polignac number, because none of the positive numbers 2^k-134428139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 134428099 and 134428108.

It is not an unprimeable number, because it can be changed into a prime (134428039) 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 5 ways as a sum of consecutive naturals, for example, 132197 + ... + 133209.

It is an arithmetic number, because the mean of its divisors is an integer number (22598026).

Almost surely, 2^134428139 is an apocalyptic number.

134428139 is a deficient number, since it is larger than the sum of its proper divisors (1160017).

134428139 is an frugal number, since it uses more digits than its factorization.

134428139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157 (or 1144 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 134428139 is about 11594.3149431090. The cubic root of 134428139 is about 512.2674117317.

The spelling of 134428139 in words is "one hundred thirty-four million, four hundred twenty-eight thousand, one hundred thirty-nine".