52128973 has 4 divisors (see below), whose sum is σ = 56138908. Its totient is φ = 48119040.

The previous prime is 52128959. The next prime is 52128997. The reversal of 52128973 is 37982125.

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 29452329 + 22676644 = 5427^2 + 4762^2 .

It is a cyclic number.

It is not a de Polignac number, because 52128973 - 2⁵ = 52128941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52128073) 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, 2004948 + ... + 2004973.

It is an arithmetic number, because the mean of its divisors is an integer number (14034727).

Almost surely, 2^52128973 is an apocalyptic number.

It is an amenable number.

52128973 is a deficient number, since it is larger than the sum of its proper divisors (4009935).

52128973 is a wasteful number, since it uses less digits than its factorization.

52128973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009934.

The product of its digits is 30240, while the sum is 37.

The square root of 52128973 is about 7220.0396813314. The cubic root of 52128973 is about 373.5594462696.

The spelling of 52128973 in words is "fifty-two million, one hundred twenty-eight thousand, nine hundred seventy-three".