71080069 has 2 divisors, whose sum is σ = 71080070. Its totient is φ = 71080068.

The previous prime is 71080039. The next prime is 71080081. The reversal of 71080069 is 96008017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35820225 + 35259844 = 5985^2 + 5938^2 .

It is a cyclic number.

It is not a de Polignac number, because 71080069 - 2¹³ = 71071877 is a prime.

It is a super-2 number, since 2×71080069² = 10104752418089522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71080069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71080039) 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, 35540034 + 35540035.

It is an arithmetic number, because the mean of its divisors is an integer number (35540035).

Almost surely, 2^71080069 is an apocalyptic number.

It is an amenable number.

71080069 is a deficient number, since it is larger than the sum of its proper divisors (1).

71080069 is an equidigital number, since it uses as much as digits as its factorization.

71080069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 71080069 is about 8430.8996554342. The cubic root of 71080069 is about 414.2373742760.

The spelling of 71080069 in words is "seventy-one million, eighty thousand, sixty-nine".