505421684 has 6 divisors (see below), whose sum is σ = 884487954. Its totient is φ = 252710840.

The previous prime is 505421681. The next prime is 505421687. The reversal of 505421684 is 486124505.

It is an interprime number because it is at equal distance from previous prime (505421681) and next prime (505421687).

It can be written as a sum of positive squares in only one way, i.e., 358042084 + 147379600 = 18922^2 + 12140^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505421681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63177707 + ... + 63177714.

It is an arithmetic number, because the mean of its divisors is an integer number (147414659).

Almost surely, 2^505421684 is an apocalyptic number.

It is an amenable number.

505421684 is a deficient number, since it is larger than the sum of its proper divisors (379066270).

505421684 is a wasteful number, since it uses less digits than its factorization.

505421684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126355425 (or 126355423 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 505421684 is about 22481.5854423126. The cubic root of 505421684 is about 796.5590144935.

The spelling of 505421684 in words is "five hundred five million, four hundred twenty-one thousand, six hundred eighty-four".