505763691 has 8 divisors (see below), whose sum is σ = 674529744. Its totient is φ = 337086720.

The previous prime is 505763677. The next prime is 505763701. The reversal of 505763691 is 196367505.

It is a happy number.

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

It is not a de Polignac number, because 505763691 - 2⁹ = 505763179 is a prime.

It is a super-2 number, since 2×505763691² = 511593822267886962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (505763611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7650 + ... + 32711.

It is an arithmetic number, because the mean of its divisors is an integer number (84316218).

Almost surely, 2^505763691 is an apocalyptic number.

505763691 is a deficient number, since it is larger than the sum of its proper divisors (168766053).

505763691 is a wasteful number, since it uses less digits than its factorization.

505763691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44541.

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 505763691 is about 22489.1905367890. The cubic root of 505763691 is about 796.7386449169.

The spelling of 505763691 in words is "five hundred five million, seven hundred sixty-three thousand, six hundred ninety-one".