71399147 has 2 divisors, whose sum is σ = 71399148. Its totient is φ = 71399146.

The previous prime is 71399137. The next prime is 71399171. The reversal of 71399147 is 74199317.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71399147 - 2²⁰ = 70350571 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71399137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35699573 + 35699574.

It is an arithmetic number, because the mean of its divisors is an integer number (35699574).

Almost surely, 2^71399147 is an apocalyptic number.

71399147 is a deficient number, since it is larger than the sum of its proper divisors (1).

71399147 is an equidigital number, since it uses as much as digits as its factorization.

71399147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 71399147 is about 8449.8015953039. The cubic root of 71399147 is about 414.8562854578.

The spelling of 71399147 in words is "seventy-one million, three hundred ninety-nine thousand, one hundred forty-seven".