71918039 has 2 divisors, whose sum is σ = 71918040. Its totient is φ = 71918038.

The previous prime is 71918027. The next prime is 71918053. The reversal of 71918039 is 93081917.

It is a weak prime.

It is an emirp because it is prime and its reverse (93081917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71918039 - 2¹² = 71913943 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 71917993 and 71918011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71918009) 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, 35959019 + 35959020.

It is an arithmetic number, because the mean of its divisors is an integer number (35959020).

Almost surely, 2^71918039 is an apocalyptic number.

71918039 is a deficient number, since it is larger than the sum of its proper divisors (1).

71918039 is an equidigital number, since it uses as much as digits as its factorization.

71918039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 71918039 is about 8480.4504007747. The cubic root of 71918039 is about 415.8588474976.

The spelling of 71918039 in words is "seventy-one million, nine hundred eighteen thousand, thirty-nine".