71589481 has 2 divisors, whose sum is σ = 71589482. Its totient is φ = 71589480.

The previous prime is 71589461. The next prime is 71589491. The reversal of 71589481 is 18498517.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68558400 + 3031081 = 8280^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 71589481 - 2⁵ = 71589449 is a prime.

It is a super-2 number, since 2×71589481² = 10250107579698722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71589451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35794740 + 35794741.

It is an arithmetic number, because the mean of its divisors is an integer number (35794741).

Almost surely, 2^71589481 is an apocalyptic number.

It is an amenable number.

71589481 is a deficient number, since it is larger than the sum of its proper divisors (1).

71589481 is an equidigital number, since it uses as much as digits as its factorization.

71589481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 43.

The square root of 71589481 is about 8461.0567306927. The cubic root of 71589481 is about 415.2245960935.

The spelling of 71589481 in words is "seventy-one million, five hundred eighty-nine thousand, four hundred eighty-one".