71033987 has 2 divisors, whose sum is σ = 71033988. Its totient is φ = 71033986.

The previous prime is 71033971. The next prime is 71033999. The reversal of 71033987 is 78933017.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (78933017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71033987 - 2⁴ = 71033971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71033987.

It is not a weakly prime, because it can be changed into another prime (71033917) 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, 35516993 + 35516994.

It is an arithmetic number, because the mean of its divisors is an integer number (35516994).

Almost surely, 2^71033987 is an apocalyptic number.

71033987 is a deficient number, since it is larger than the sum of its proper divisors (1).

71033987 is an equidigital number, since it uses as much as digits as its factorization.

71033987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 71033987 is about 8428.1662892945. The cubic root of 71033987 is about 414.1478366901.

The spelling of 71033987 in words is "seventy-one million, thirty-three thousand, nine hundred eighty-seven".