71009959 has 2 divisors, whose sum is σ = 71009960. Its totient is φ = 71009958.

The previous prime is 71009941. The next prime is 71010013. The reversal of 71009959 is 95990017.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71009959 - 2⁷ = 71009831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71009929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35504979 + 35504980.

It is an arithmetic number, because the mean of its divisors is an integer number (35504980).

Almost surely, 2^71009959 is an apocalyptic number.

71009959 is a deficient number, since it is larger than the sum of its proper divisors (1).

71009959 is an equidigital number, since it uses as much as digits as its factorization.

71009959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25515, while the sum is 40.

The square root of 71009959 is about 8426.7407103814. The cubic root of 71009959 is about 414.1011347902.

The spelling of 71009959 in words is "seventy-one million, nine thousand, nine hundred fifty-nine".