505678723 has 6 divisors (see below), whose sum is σ = 555828812. Its totient is φ = 459707820.

The previous prime is 505678699. The next prime is 505678739. The reversal of 505678723 is 327876505.

It is not a de Polignac number, because 505678723 - 2⁹ = 505678211 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 505678723.

It is not an unprimeable number, because it can be changed into a prime (505672723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2089461 + ... + 2089702.

Almost surely, 2^505678723 is an apocalyptic number.

505678723 is a deficient number, since it is larger than the sum of its proper divisors (50150089).

505678723 is a wasteful number, since it uses less digits than its factorization.

505678723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179185 (or 4179174 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 505678723 is about 22487.3013721078. The cubic root of 505678723 is about 796.6940252116.

The spelling of 505678723 in words is "five hundred five million, six hundred seventy-eight thousand, seven hundred twenty-three".