81468971 has 2 divisors, whose sum is σ = 81468972. Its totient is φ = 81468970.

The previous prime is 81468929. The next prime is 81469019. The reversal of 81468971 is 17986418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81468971 - 2²² = 77274667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81461971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40734485 + 40734486.

It is an arithmetic number, because the mean of its divisors is an integer number (40734486).

Almost surely, 2^81468971 is an apocalyptic number.

81468971 is a deficient number, since it is larger than the sum of its proper divisors (1).

81468971 is an equidigital number, since it uses as much as digits as its factorization.

81468971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 81468971 is about 9026.0163416648. The cubic root of 81468971 is about 433.5082933865.

The spelling of 81468971 in words is "eighty-one million, four hundred sixty-eight thousand, nine hundred seventy-one".