52660389 has 4 divisors (see below), whose sum is σ = 70213856. Its totient is φ = 35106924.

The previous prime is 52660379. The next prime is 52660397. The reversal of 52660389 is 98306625.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 52660389 - 2⁹ = 52659877 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 (52660319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8776729 + ... + 8776734.

It is an arithmetic number, because the mean of its divisors is an integer number (17553464).

Almost surely, 2^52660389 is an apocalyptic number.

It is an amenable number.

52660389 is a deficient number, since it is larger than the sum of its proper divisors (17553467).

52660389 is a wasteful number, since it uses less digits than its factorization.

52660389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17553466.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 52660389 is about 7256.7478253003. The cubic root of 52660389 is about 374.8245436975.

The spelling of 52660389 in words is "fifty-two million, six hundred sixty thousand, three hundred eighty-nine".