506067721 has 8 divisors (see below), whose sum is σ = 519956640. Its totient is φ = 492355968.

The previous prime is 506067697. The next prime is 506067739. The reversal of 506067721 is 127760605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 506067721 - 2⁹ = 506067209 is a prime.

It is a super-2 number, since 2×506067721² = 512209076476267682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506067791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38491 + ... + 49936.

It is an arithmetic number, because the mean of its divisors is an integer number (64994580).

Almost surely, 2^506067721 is an apocalyptic number.

It is an amenable number.

506067721 is a deficient number, since it is larger than the sum of its proper divisors (13888919).

506067721 is an equidigital number, since it uses as much as digits as its factorization.

506067721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88583.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 506067721 is about 22495.9489908739. The cubic root of 506067721 is about 796.8982609147.

The spelling of 506067721 in words is "five hundred six million, sixty-seven thousand, seven hundred twenty-one".