71448647 has 2 divisors, whose sum is σ = 71448648. Its totient is φ = 71448646.

The previous prime is 71448623. The next prime is 71448653. The reversal of 71448647 is 74684417.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71448647 - 2¹² = 71444551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71448617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35724323 + 35724324.

It is an arithmetic number, because the mean of its divisors is an integer number (35724324).

Almost surely, 2^71448647 is an apocalyptic number.

71448647 is a deficient number, since it is larger than the sum of its proper divisors (1).

71448647 is an equidigital number, since it uses as much as digits as its factorization.

71448647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 41.

The square root of 71448647 is about 8452.7301506673. The cubic root of 71448647 is about 414.9521346063.

The spelling of 71448647 in words is "seventy-one million, four hundred forty-eight thousand, six hundred forty-seven".