505890971 has 4 divisors (see below), whose sum is σ = 510619032. Its totient is φ = 501162912.

The previous prime is 505890967. The next prime is 505891013. The reversal of 505890971 is 179098505.

It is a happy number.

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 505890971 - 2² = 505890967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505890961) 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, 2363870 + ... + 2364083.

It is an arithmetic number, because the mean of its divisors is an integer number (127654758).

Almost surely, 2^505890971 is an apocalyptic number.

505890971 is a deficient number, since it is larger than the sum of its proper divisors (4728061).

505890971 is a wasteful number, since it uses less digits than its factorization.

505890971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728060.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 505890971 is about 22492.0201627155. The cubic root of 505890971 is about 796.8054748027.

The spelling of 505890971 in words is "five hundred five million, eight hundred ninety thousand, nine hundred seventy-one".