505535879 has 4 divisors (see below), whose sum is σ = 521843520. Its totient is φ = 489228240.

The previous prime is 505535873. The next prime is 505535881. The reversal of 505535879 is 978535505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978535505 = 5 ⋅195707101.

It is a cyclic number.

It is not a de Polignac number, because 505535879 - 2¹² = 505531783 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 (505535873) 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, 8153774 + ... + 8153835.

It is an arithmetic number, because the mean of its divisors is an integer number (130460880).

Almost surely, 2^505535879 is an apocalyptic number.

505535879 is a deficient number, since it is larger than the sum of its proper divisors (16307641).

505535879 is a wasteful number, since it uses less digits than its factorization.

505535879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16307640.

The product of its (nonzero) digits is 945000, while the sum is 47.

The square root of 505535879 is about 22484.1250441284. The cubic root of 505535879 is about 796.6190015035.

The spelling of 505535879 in words is "five hundred five million, five hundred thirty-five thousand, eight hundred seventy-nine".