71636791 has 2 divisors, whose sum is σ = 71636792. Its totient is φ = 71636790.

The previous prime is 71636779. The next prime is 71636813. The reversal of 71636791 is 19763617.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71636791 - 2¹⁵ = 71604023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71636701) 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, 35818395 + 35818396.

It is an arithmetic number, because the mean of its divisors is an integer number (35818396).

Almost surely, 2^71636791 is an apocalyptic number.

71636791 is a deficient number, since it is larger than the sum of its proper divisors (1).

71636791 is an equidigital number, since it uses as much as digits as its factorization.

71636791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 71636791 is about 8463.8520190277. The cubic root of 71636791 is about 415.3160431872.

It can be divided in two parts, 71636 and 791, that added together give a palindrome (72427).

The spelling of 71636791 in words is "seventy-one million, six hundred thirty-six thousand, seven hundred ninety-one".