134428947 has 4 divisors (see below), whose sum is σ = 179238600. Its totient is φ = 89619296.

The previous prime is 134428919. The next prime is 134428967. The reversal of 134428947 is 749824431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749824431 = 3 ⋅249941477.

It is a cyclic number.

It is not a de Polignac number, because 134428947 - 2¹¹ = 134426899 is a prime.

It is a super-2 number, since 2×134428947² = 36142283583057618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 134428899 and 134428908.

It is not an unprimeable number, because it can be changed into a prime (134428907) 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, 22404822 + ... + 22404827.

It is an arithmetic number, because the mean of its divisors is an integer number (44809650).

Almost surely, 2^134428947 is an apocalyptic number.

134428947 is a deficient number, since it is larger than the sum of its proper divisors (44809653).

134428947 is an equidigital number, since it uses as much as digits as its factorization.

134428947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44809652.

The product of its digits is 193536, while the sum is 42.

The square root of 134428947 is about 11594.3497877199. The cubic root of 134428947 is about 512.2684380824.

The spelling of 134428947 in words is "one hundred thirty-four million, four hundred twenty-eight thousand, nine hundred forty-seven".