84272017 has 2 divisors, whose sum is σ = 84272018. Its totient is φ = 84272016.

The previous prime is 84271939. The next prime is 84272021. The reversal of 84272017 is 71027248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76895361 + 7376656 = 8769^2 + 2716^2 .

It is a cyclic number.

It is not a de Polignac number, because 84272017 - 2¹⁵ = 84239249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84272017.

It is not a weakly prime, because it can be changed into another prime (84272317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42136008 + 42136009.

It is an arithmetic number, because the mean of its divisors is an integer number (42136009).

Almost surely, 2^84272017 is an apocalyptic number.

It is an amenable number.

84272017 is a deficient number, since it is larger than the sum of its proper divisors (1).

84272017 is an equidigital number, since it uses as much as digits as its factorization.

84272017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 84272017 is about 9179.9791394098. The cubic root of 84272017 is about 438.4241441612.

The spelling of 84272017 in words is "eighty-four million, two hundred seventy-two thousand, seventeen".