52791389 has 4 divisors (see below), whose sum is σ = 60333024. Its totient is φ = 45249756.

The previous prime is 52791379. The next prime is 52791391. The reversal of 52791389 is 98319725.

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 a cyclic number.

It is not a de Polignac number, because 52791389 - 2⁴ = 52791373 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 (52791379) 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, 3770807 + ... + 3770820.

It is an arithmetic number, because the mean of its divisors is an integer number (15083256).

Almost surely, 2^52791389 is an apocalyptic number.

It is an amenable number.

52791389 is a deficient number, since it is larger than the sum of its proper divisors (7541635).

52791389 is an equidigital number, since it uses as much as digits as its factorization.

52791389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7541634.

The product of its digits is 136080, while the sum is 44.

The square root of 52791389 is about 7265.7683007374. The cubic root of 52791389 is about 375.1350956216.

The spelling of 52791389 in words is "fifty-two million, seven hundred ninety-one thousand, three hundred eighty-nine".