71980067 has 2 divisors, whose sum is σ = 71980068. Its totient is φ = 71980066.

The previous prime is 71980031. The next prime is 71980081. The reversal of 71980067 is 76008917.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71980067 - 2¹⁸ = 71717923 is a prime.

It is a super-4 number, since 4×71980067⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 71980067.

It is not a weakly prime, because it can be changed into another prime (71980267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35990033 + 35990034.

It is an arithmetic number, because the mean of its divisors is an integer number (35990034).

Almost surely, 2^71980067 is an apocalyptic number.

71980067 is a deficient number, since it is larger than the sum of its proper divisors (1).

71980067 is an equidigital number, since it uses as much as digits as its factorization.

71980067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 71980067 is about 8484.1067296446. The cubic root of 71980067 is about 415.9783700385.

The spelling of 71980067 in words is "seventy-one million, nine hundred eighty thousand, sixty-seven".