71791667 has 2 divisors, whose sum is σ = 71791668. Its totient is φ = 71791666.

The previous prime is 71791661. The next prime is 71791669. The reversal of 71791667 is 76619717.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (76619717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71791667 - 2⁸ = 71791411 is a prime.

It is a super-3 number, since 3×71791667³ (a number of 25 digits) contains 333 as substring.

Together with 71791669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71791661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35895833 + 35895834.

It is an arithmetic number, because the mean of its divisors is an integer number (35895834).

Almost surely, 2^71791667 is an apocalyptic number.

71791667 is a deficient number, since it is larger than the sum of its proper divisors (1).

71791667 is an equidigital number, since it uses as much as digits as its factorization.

71791667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 44.

The square root of 71791667 is about 8472.9963413187. The cubic root of 71791667 is about 415.6151268840.

The spelling of 71791667 in words is "seventy-one million, seven hundred ninety-one thousand, six hundred sixty-seven".