52170389 has 2 divisors, whose sum is σ = 52170390. Its totient is φ = 52170388.

The previous prime is 52170367. The next prime is 52170401. The reversal of 52170389 is 98307125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 1119364 = 7145^2 + 1058^2 .

It is a cyclic number.

It is not a de Polignac number, because 52170389 - 2¹² = 52166293 is a prime.

It is a super-2 number, since 2×52170389² = 5443498976822642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52170319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26085194 + 26085195.

It is an arithmetic number, because the mean of its divisors is an integer number (26085195).

Almost surely, 2^52170389 is an apocalyptic number.

It is an amenable number.

52170389 is a deficient number, since it is larger than the sum of its proper divisors (1).

52170389 is an equidigital number, since it uses as much as digits as its factorization.

52170389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 52170389 is about 7222.9072401631. The cubic root of 52170389 is about 373.6583499545.

The spelling of 52170389 in words is "fifty-two million, one hundred seventy thousand, three hundred eighty-nine".