536871721 has 2 divisors, whose sum is σ = 536871722. Its totient is φ = 536871720.

The previous prime is 536871719. The next prime is 536871743. The reversal of 536871721 is 127178635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281031696 + 255840025 = 16764^2 + 15995^2 .

It is a cyclic number.

It is not a de Polignac number, because 536871721 - 2¹ = 536871719 is a prime.

Together with 536871719, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (536871421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268435860 + 268435861.

It is an arithmetic number, because the mean of its divisors is an integer number (268435861).

Almost surely, 2^536871721 is an apocalyptic number.

It is an amenable number.

536871721 is a deficient number, since it is larger than the sum of its proper divisors (1).

536871721 is an equidigital number, since it uses as much as digits as its factorization.

536871721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 40.

The square root of 536871721 is about 23170.4924634760. The cubic root of 536871721 is about 812.7497468461.

The spelling of 536871721 in words is "five hundred thirty-six million, eight hundred seventy-one thousand, seven hundred twenty-one".