128313733 has 4 divisors (see below), whose sum is σ = 129584268. Its totient is φ = 127043200.

The previous prime is 128313721. The next prime is 128313737. The reversal of 128313733 is 337313821.

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

It can be written as a sum of positive squares in 2 ways, for example, as 116596804 + 11716929 = 10798^2 + 3423^2 .

It is a cyclic number.

It is not a de Polignac number, because 128313733 - 2⁵ = 128313701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128313695 and 128313704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128313737) 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, 635116 + ... + 635317.

It is an arithmetic number, because the mean of its divisors is an integer number (32396067).

Almost surely, 2^128313733 is an apocalyptic number.

It is an amenable number.

128313733 is a deficient number, since it is larger than the sum of its proper divisors (1270535).

128313733 is a wasteful number, since it uses less digits than its factorization.

128313733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270534.

The product of its digits is 9072, while the sum is 31.

The square root of 128313733 is about 11327.5651840985. The cubic root of 128313733 is about 504.3798327724.

The spelling of 128313733 in words is "one hundred twenty-eight million, three hundred thirteen thousand, seven hundred thirty-three".