84072971 has 2 divisors, whose sum is σ = 84072972. Its totient is φ = 84072970.

The previous prime is 84072959. The next prime is 84073021. The reversal of 84072971 is 17927048.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84072971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84072071) 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, 42036485 + 42036486.

It is an arithmetic number, because the mean of its divisors is an integer number (42036486).

Almost surely, 2^84072971 is an apocalyptic number.

84072971 is a deficient number, since it is larger than the sum of its proper divisors (1).

84072971 is an equidigital number, since it uses as much as digits as its factorization.

84072971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 84072971 is about 9169.1314201510. The cubic root of 84072971 is about 438.0786939080.

The spelling of 84072971 in words is "eighty-four million, seventy-two thousand, nine hundred seventy-one".