71321053 has 2 divisors, whose sum is σ = 71321054. Its totient is φ = 71321052.

The previous prime is 71321051. The next prime is 71321057. The reversal of 71321053 is 35012317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70862724 + 458329 = 8418^2 + 677^2 .

It is an emirp because it is prime and its reverse (35012317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71321053 - 2¹ = 71321051 is a prime.

Together with 71321051, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71321051) 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, 35660526 + 35660527.

It is an arithmetic number, because the mean of its divisors is an integer number (35660527).

Almost surely, 2^71321053 is an apocalyptic number.

It is an amenable number.

71321053 is a deficient number, since it is larger than the sum of its proper divisors (1).

71321053 is an equidigital number, since it uses as much as digits as its factorization.

71321053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 71321053 is about 8445.1792757762. The cubic root of 71321053 is about 414.7049783009.

The spelling of 71321053 in words is "seventy-one million, three hundred twenty-one thousand, fifty-three".