133928705 has 4 divisors (see below), whose sum is σ = 160714452. Its totient is φ = 107142960.

The previous prime is 133928689. The next prime is 133928719. The reversal of 133928705 is 507829331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 507829331 = 61 ⋅8325071.

It can be written as a sum of positive squares in 2 ways, for example, as 14070001 + 119858704 = 3751^2 + 10948^2 .

It is not a de Polignac number, because 133928705 - 2⁴ = 133928689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13392866 + ... + 13392875.

It is an arithmetic number, because the mean of its divisors is an integer number (40178613).

Almost surely, 2^133928705 is an apocalyptic number.

It is an amenable number.

133928705 is a deficient number, since it is larger than the sum of its proper divisors (26785747).

133928705 is an equidigital number, since it uses as much as digits as its factorization.

133928705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26785746.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 133928705 is about 11572.7570181007. The cubic root of 133928705 is about 511.6322241361.

The spelling of 133928705 in words is "one hundred thirty-three million, nine hundred twenty-eight thousand, seven hundred five".