71389673 has 2 divisors, whose sum is σ = 71389674. Its totient is φ = 71389672.

The previous prime is 71389601. The next prime is 71389679. The reversal of 71389673 is 37698317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57274624 + 14115049 = 7568^2 + 3757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71389673 is a prime.

It is a super-2 number, since 2×71389673² = 10192970822093858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71389679) 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, 35694836 + 35694837.

It is an arithmetic number, because the mean of its divisors is an integer number (35694837).

Almost surely, 2^71389673 is an apocalyptic number.

It is an amenable number.

71389673 is a deficient number, since it is larger than the sum of its proper divisors (1).

71389673 is an equidigital number, since it uses as much as digits as its factorization.

71389673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 71389673 is about 8449.2409718270. The cubic root of 71389673 is about 414.8379354612.

The spelling of 71389673 in words is "seventy-one million, three hundred eighty-nine thousand, six hundred seventy-three".