505405963 has 4 divisors (see below), whose sum is σ = 508229640. Its totient is φ = 502582288.

The previous prime is 505405921. The next prime is 505405981. The reversal of 505405963 is 369504505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505405963 - 2²¹ = 503308811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505405063) 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, 1411570 + ... + 1411927.

It is an arithmetic number, because the mean of its divisors is an integer number (127057410).

Almost surely, 2^505405963 is an apocalyptic number.

505405963 is a deficient number, since it is larger than the sum of its proper divisors (2823677).

505405963 is a wasteful number, since it uses less digits than its factorization.

505405963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823676.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 505405963 is about 22481.2357978826. The cubic root of 505405963 is about 796.5507554928.

The spelling of 505405963 in words is "five hundred five million, four hundred five thousand, nine hundred sixty-three".