71691007 has 2 divisors, whose sum is σ = 71691008. Its totient is φ = 71691006.

The previous prime is 71690981. The next prime is 71691017. The reversal of 71691007 is 70019617.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71691007 - 2²³ = 63302399 is a prime.

It is equal to p_4211689 and since 71691007 and 4211689 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71691007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71691017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35845503 + 35845504.

It is an arithmetic number, because the mean of its divisors is an integer number (35845504).

Almost surely, 2^71691007 is an apocalyptic number.

71691007 is a deficient number, since it is larger than the sum of its proper divisors (1).

71691007 is an equidigital number, since it uses as much as digits as its factorization.

71691007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 71691007 is about 8467.0542102906. The cubic root of 71691007 is about 415.4207896278.

The spelling of 71691007 in words is "seventy-one million, six hundred ninety-one thousand, seven".