71907971 has 2 divisors, whose sum is σ = 71907972. Its totient is φ = 71907970.

The previous prime is 71907967. The next prime is 71907991. The reversal of 71907971 is 17970917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71907971 - 2² = 71907967 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71907931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35953985 + 35953986.

It is an arithmetic number, because the mean of its divisors is an integer number (35953986).

Almost surely, 2^71907971 is an apocalyptic number.

71907971 is a deficient number, since it is larger than the sum of its proper divisors (1).

71907971 is an equidigital number, since it uses as much as digits as its factorization.

71907971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27783, while the sum is 41.

The square root of 71907971 is about 8479.8567794509. The cubic root of 71907971 is about 415.8394408585.

The spelling of 71907971 in words is "seventy-one million, nine hundred seven thousand, nine hundred seventy-one".