52171789 has 2 divisors, whose sum is σ = 52171790. Its totient is φ = 52171788.

The previous prime is 52171747. The next prime is 52171799. The reversal of 52171789 is 98717125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47375689 + 4796100 = 6883^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 52171789 - 2⁹ = 52171277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52171709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26085894 + 26085895.

It is an arithmetic number, because the mean of its divisors is an integer number (26085895).

Almost surely, 2^52171789 is an apocalyptic number.

It is an amenable number.

52171789 is a deficient number, since it is larger than the sum of its proper divisors (1).

52171789 is an equidigital number, since it uses as much as digits as its factorization.

52171789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 40.

The square root of 52171789 is about 7223.0041533977. The cubic root of 52171789 is about 373.6616923167.

The spelling of 52171789 in words is "fifty-two million, one hundred seventy-one thousand, seven hundred eighty-nine".