71895569 has 2 divisors, whose sum is σ = 71895570. Its totient is φ = 71895568.

The previous prime is 71895557. The next prime is 71895587. The reversal of 71895569 is 96559817.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56055169 + 15840400 = 7487^2 + 3980^2 .

It is an emirp because it is prime and its reverse (96559817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71895569 - 2¹² = 71891473 is a prime.

It is a super-2 number, since 2×71895569² = 10337945683667522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71891569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35947784 + 35947785.

It is an arithmetic number, because the mean of its divisors is an integer number (35947785).

Almost surely, 2^71895569 is an apocalyptic number.

It is an amenable number.

71895569 is a deficient number, since it is larger than the sum of its proper divisors (1).

71895569 is an equidigital number, since it uses as much as digits as its factorization.

71895569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 50.

The square root of 71895569 is about 8479.1254855675. The cubic root of 71895569 is about 415.8155328124.

The spelling of 71895569 in words is "seventy-one million, eight hundred ninety-five thousand, five hundred sixty-nine".