71277971 has 2 divisors, whose sum is σ = 71277972. Its totient is φ = 71277970.

The previous prime is 71277937. The next prime is 71278001. The reversal of 71277971 is 17977217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71277971 - 2⁶ = 71277907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71277901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35638985 + 35638986.

It is an arithmetic number, because the mean of its divisors is an integer number (35638986).

Almost surely, 2^71277971 is an apocalyptic number.

71277971 is a deficient number, since it is larger than the sum of its proper divisors (1).

71277971 is an equidigital number, since it uses as much as digits as its factorization.

71277971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43218, while the sum is 41.

The square root of 71277971 is about 8442.6282045344. The cubic root of 71277971 is about 414.6214596307.

The spelling of 71277971 in words is "seventy-one million, two hundred seventy-seven thousand, nine hundred seventy-one".