71721301 has 2 divisors, whose sum is σ = 71721302. Its totient is φ = 71721300.

The previous prime is 71721277. The next prime is 71721311. The reversal of 71721301 is 10312717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50552100 + 21169201 = 7110^2 + 4601^2 .

It is a cyclic number.

It is not a de Polignac number, because 71721301 - 2⁷ = 71721173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71721311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35860650 + 35860651.

It is an arithmetic number, because the mean of its divisors is an integer number (35860651).

Almost surely, 2^71721301 is an apocalyptic number.

It is an amenable number.

71721301 is a deficient number, since it is larger than the sum of its proper divisors (1).

71721301 is an equidigital number, since it uses as much as digits as its factorization.

71721301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 71721301 is about 8468.8429552094. The cubic root of 71721301 is about 415.4792952699.

The spelling of 71721301 in words is "seventy-one million, seven hundred twenty-one thousand, three hundred one".