52840279 has 4 divisors (see below), whose sum is σ = 53434080. Its totient is φ = 52246480.

The previous prime is 52840261. The next prime is 52840313. The reversal of 52840279 is 97204825.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52840279 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 (52840219) 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, 296767 + ... + 296944.

It is an arithmetic number, because the mean of its divisors is an integer number (13358520).

Almost surely, 2^52840279 is an apocalyptic number.

52840279 is a deficient number, since it is larger than the sum of its proper divisors (593801).

52840279 is an equidigital number, since it uses as much as digits as its factorization.

52840279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593800.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 52840279 is about 7269.1319289170. The cubic root of 52840279 is about 375.2508638458.

The spelling of 52840279 in words is "fifty-two million, eight hundred forty thousand, two hundred seventy-nine".