71561453 has 2 divisors, whose sum is σ = 71561454. Its totient is φ = 71561452.

The previous prime is 71561447. The next prime is 71561471. The reversal of 71561453 is 35416517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63648484 + 7912969 = 7978^2 + 2813^2 .

It is an emirp because it is prime and its reverse (35416517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71561453 - 2⁴ = 71561437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71561753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35780726 + 35780727.

It is an arithmetic number, because the mean of its divisors is an integer number (35780727).

Almost surely, 2^71561453 is an apocalyptic number.

It is an amenable number.

71561453 is a deficient number, since it is larger than the sum of its proper divisors (1).

71561453 is an equidigital number, since it uses as much as digits as its factorization.

71561453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 32.

The square root of 71561453 is about 8459.4002742511. The cubic root of 71561453 is about 415.1704008220.

The spelling of 71561453 in words is "seventy-one million, five hundred sixty-one thousand, four hundred fifty-three".