505811867 has 8 divisors (see below), whose sum is σ = 566708592. Its totient is φ = 447400800.

The previous prime is 505811759. The next prime is 505811869. The reversal of 505811867 is 768118505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505811867 - 2¹⁶ = 505746331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505811869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620984 + ... + 621797.

It is an arithmetic number, because the mean of its divisors is an integer number (70838574).

Almost surely, 2^505811867 is an apocalyptic number.

505811867 is a deficient number, since it is larger than the sum of its proper divisors (60896725).

505811867 is a wasteful number, since it uses less digits than its factorization.

505811867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242829.

The product of its (nonzero) digits is 67200, while the sum is 41.

The square root of 505811867 is about 22490.2616036364. The cubic root of 505811867 is about 796.7639416203.

The spelling of 505811867 in words is "five hundred five million, eight hundred eleven thousand, eight hundred sixty-seven".