71576641 has 2 divisors, whose sum is σ = 71576642. Its totient is φ = 71576640.

The previous prime is 71576633. The next prime is 71576653. The reversal of 71576641 is 14667517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 5041 = 8460^2 + 71^2 .

It is an emirp because it is prime and its reverse (14667517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71576641 - 2³ = 71576633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71576641.

It is not a weakly prime, because it can be changed into another prime (71576041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35788320 + 35788321.

It is an arithmetic number, because the mean of its divisors is an integer number (35788321).

Almost surely, 2^71576641 is an apocalyptic number.

It is an amenable number.

71576641 is a deficient number, since it is larger than the sum of its proper divisors (1).

71576641 is an equidigital number, since it uses as much as digits as its factorization.

71576641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 71576641 is about 8460.2979261962. The cubic root of 71576641 is about 415.1997702741.

The spelling of 71576641 in words is "seventy-one million, five hundred seventy-six thousand, six hundred forty-one".