539864405 has 6 divisors (see below), whose sum is σ = 647899638. Its totient is φ = 431849960.

The previous prime is 539864383. The next prime is 539864417. The reversal of 539864405 is 504468935.

It can be written as a sum of positive squares in only one way, i.e., 431891524 + 107972881 = 20782^2 + 10391^2 .

It is not a de Polignac number, because 539864405 - 2²⁰ = 538815829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46760 + ... + 57150.

It is an arithmetic number, because the mean of its divisors is an integer number (107983273).

Almost surely, 2^539864405 is an apocalyptic number.

It is an amenable number.

539864405 is a deficient number, since it is larger than the sum of its proper divisors (108035233).

539864405 is an frugal number, since it uses more digits than its factorization.

539864405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20787 (or 10396 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 539864405 is about 23234.9823542003. The cubic root of 539864405 is about 814.2571197437.

The spelling of 539864405 in words is "five hundred thirty-nine million, eight hundred sixty-four thousand, four hundred five".