52108987391 has 4 divisors (see below), whose sum is σ = 52111024992. Its totient is φ = 52106949792.

The previous prime is 52108987379. The next prime is 52108987409. The reversal of 52108987391 is 19378980125.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 52108987391 - 2¹⁴ = 52108971007 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 (52108987891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 979946 + ... + 1031751.

It is an arithmetic number, because the mean of its divisors is an integer number (13027756248).

Almost surely, 2^52108987391 is an apocalyptic number.

52108987391 is a deficient number, since it is larger than the sum of its proper divisors (2037601).

52108987391 is a wasteful number, since it uses less digits than its factorization.

52108987391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037600.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 52108987391 in words is "fifty-two billion, one hundred eight million, nine hundred eighty-seven thousand, three hundred ninety-one".