85767971 has 2 divisors, whose sum is σ = 85767972. Its totient is φ = 85767970.

The previous prime is 85767953. The next prime is 85768019. The reversal of 85767971 is 17976758.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85767971 is a prime.

It is a super-2 number, since 2×85767971² = 14712289698913682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85767931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42883985 + 42883986.

It is an arithmetic number, because the mean of its divisors is an integer number (42883986).

Almost surely, 2^85767971 is an apocalyptic number.

85767971 is a deficient number, since it is larger than the sum of its proper divisors (1).

85767971 is an equidigital number, since it uses as much as digits as its factorization.

85767971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 50.

The square root of 85767971 is about 9261.0998806837. The cubic root of 85767971 is about 441.0031708097.

The spelling of 85767971 in words is "eighty-five million, seven hundred sixty-seven thousand, nine hundred seventy-one".