71348989 has 2 divisors, whose sum is σ = 71348990. Its totient is φ = 71348988.

The previous prime is 71348969. The next prime is 71349053. The reversal of 71348989 is 98984317.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71064900 + 284089 = 8430^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 71348989 - 2⁵ = 71348957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71348939) 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, 35674494 + 35674495.

It is an arithmetic number, because the mean of its divisors is an integer number (35674495).

Almost surely, 2^71348989 is an apocalyptic number.

It is an amenable number.

71348989 is a deficient number, since it is larger than the sum of its proper divisors (1).

71348989 is an equidigital number, since it uses as much as digits as its factorization.

71348989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 71348989 is about 8446.8330751827. The cubic root of 71348989 is about 414.7591169949.

The spelling of 71348989 in words is "seventy-one million, three hundred forty-eight thousand, nine hundred eighty-nine".