84272239820189 has 2 divisors, whose sum is σ = 84272239820190. Its totient is φ = 84272239820188.

The previous prime is 84272239820177. The next prime is 84272239820239. The reversal of 84272239820189 is 98102893227248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80563495664089 + 3708744156100 = 8975717^2 + 1925810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84272239820189 is a prime.

It is a super-2 number, since 2×84272239820189² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84272239820689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42136119910094 + 42136119910095.

It is an arithmetic number, because the mean of its divisors is an integer number (42136119910095).

Almost surely, 2^{84272239820189} is an apocalyptic number.

It is an amenable number.

84272239820189 is a deficient number, since it is larger than the sum of its proper divisors (1).

84272239820189 is an equidigital number, since it uses as much as digits as its factorization.

84272239820189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55738368, while the sum is 65.

The spelling of 84272239820189 in words is "eighty-four trillion, two hundred seventy-two billion, two hundred thirty-nine million, eight hundred twenty thousand, one hundred eighty-nine".