505763681 has 4 divisors (see below), whose sum is σ = 510674112. Its totient is φ = 500853252.

The previous prime is 505763677. The next prime is 505763701. The reversal of 505763681 is 186367505.

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 505763681 - 2² = 505763677 is a prime.

It is a super-2 number, since 2×505763681² = 511593802037339522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505763611) 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, 2455061 + ... + 2455266.

It is an arithmetic number, because the mean of its divisors is an integer number (127668528).

Almost surely, 2^505763681 is an apocalyptic number.

It is an amenable number.

505763681 is a deficient number, since it is larger than the sum of its proper divisors (4910431).

505763681 is a wasteful number, since it uses less digits than its factorization.

505763681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4910430.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 505763681 is about 22489.1903144600. The cubic root of 505763681 is about 796.7386396658.

The spelling of 505763681 in words is "five hundred five million, seven hundred sixty-three thousand, six hundred eighty-one".