71900117 has 2 divisors, whose sum is σ = 71900118. Its totient is φ = 71900116.

The previous prime is 71900111. The next prime is 71900137. The reversal of 71900117 is 71100917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71250481 + 649636 = 8441^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 71900117 - 2⁶ = 71900053 is a prime.

It is a super-2 number, since 2×71900117² = 10339253649227378, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71900111) 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, 35950058 + 35950059.

It is an arithmetic number, because the mean of its divisors is an integer number (35950059).

Almost surely, 2^71900117 is an apocalyptic number.

It is an amenable number.

71900117 is a deficient number, since it is larger than the sum of its proper divisors (1).

71900117 is an equidigital number, since it uses as much as digits as its factorization.

71900117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 441, while the sum is 26.

The square root of 71900117 is about 8479.3936693610. The cubic root of 71900117 is about 415.8243005719.

The spelling of 71900117 in words is "seventy-one million, nine hundred thousand, one hundred seventeen".