506997143 has 4 divisors (see below), whose sum is σ = 507079608. Its totient is φ = 506914680.

The previous prime is 506997097. The next prime is 506997151. The reversal of 506997143 is 341799605.

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 506997143 - 2²⁴ = 490219927 is a prime.

It is a super-2 number, since 2×506997143² = 514092206020324898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 506997094 and 506997103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506997163) 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, 31196 + ... + 44577.

It is an arithmetic number, because the mean of its divisors is an integer number (126769902).

Almost surely, 2^506997143 is an apocalyptic number.

506997143 is a deficient number, since it is larger than the sum of its proper divisors (82465).

506997143 is an equidigital number, since it uses as much as digits as its factorization.

506997143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82464.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 506997143 is about 22516.5970563938. The cubic root of 506997143 is about 797.3858121447.

The spelling of 506997143 in words is "five hundred six million, nine hundred ninety-seven thousand, one hundred forty-three".