71079949 has 2 divisors, whose sum is σ = 71079950. Its totient is φ = 71079948.

The previous prime is 71079947. The next prime is 71080001. The reversal of 71079949 is 94997017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67947049 + 3132900 = 8243^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 71079949 - 2¹ = 71079947 is a prime.

Together with 71079947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 71079899 and 71079908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71079947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35539974 + 35539975.

It is an arithmetic number, because the mean of its divisors is an integer number (35539975).

Almost surely, 2^71079949 is an apocalyptic number.

It is an amenable number.

71079949 is a deficient number, since it is larger than the sum of its proper divisors (1).

71079949 is an equidigital number, since it uses as much as digits as its factorization.

71079949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 71079949 is about 8430.8925387529. The cubic root of 71079949 is about 414.2371411656.

The spelling of 71079949 in words is "seventy-one million, seventy-nine thousand, nine hundred forty-nine".