85772971 has 2 divisors, whose sum is σ = 85772972. Its totient is φ = 85772970.

The previous prime is 85772933. The next prime is 85773013. The reversal of 85772971 is 17927758.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85772971 is a prime.

It is not a weakly prime, because it can be changed into another prime (85778971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42886485 + 42886486.

It is an arithmetic number, because the mean of its divisors is an integer number (42886486).

Almost surely, 2^85772971 is an apocalyptic number.

85772971 is a deficient number, since it is larger than the sum of its proper divisors (1).

85772971 is an equidigital number, since it uses as much as digits as its factorization.

85772971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 46.

The square root of 85772971 is about 9261.3698230877. The cubic root of 85772971 is about 441.0117403373.

The spelling of 85772971 in words is "eighty-five million, seven hundred seventy-two thousand, nine hundred seventy-one".