71530673 has 2 divisors, whose sum is σ = 71530674. Its totient is φ = 71530672.

The previous prime is 71530637. The next prime is 71530681. The reversal of 71530673 is 37603517.

Together with previous prime (71530637) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44729344 + 26801329 = 6688^2 + 5177^2 .

It is a cyclic number.

It is not a de Polignac number, because 71530673 - 2¹² = 71526577 is a prime.

It is not a weakly prime, because it can be changed into another prime (71530873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35765336 + 35765337.

It is an arithmetic number, because the mean of its divisors is an integer number (35765337).

Almost surely, 2^71530673 is an apocalyptic number.

It is an amenable number.

71530673 is a deficient number, since it is larger than the sum of its proper divisors (1).

71530673 is an equidigital number, since it uses as much as digits as its factorization.

71530673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 32.

The square root of 71530673 is about 8457.5808006782. The cubic root of 71530673 is about 415.1108679450.

The spelling of 71530673 in words is "seventy-one million, five hundred thirty thousand, six hundred seventy-three".