84728719 has 2 divisors, whose sum is σ = 84728720. Its totient is φ = 84728718.

The previous prime is 84728717. The next prime is 84728723. The reversal of 84728719 is 91782748.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84728719 - 2¹ = 84728717 is a prime.

It is a super-2 number, since 2×84728719² = 14357911646761922, which contains 22 as substring.

Together with 84728717, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84728717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42364359 + 42364360.

It is an arithmetic number, because the mean of its divisors is an integer number (42364360).

Almost surely, 2^84728719 is an apocalyptic number.

84728719 is a deficient number, since it is larger than the sum of its proper divisors (1).

84728719 is an equidigital number, since it uses as much as digits as its factorization.

84728719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 46.

The square root of 84728719 is about 9204.8204219311. The cubic root of 84728719 is about 439.2147132799.

The spelling of 84728719 in words is "eighty-four million, seven hundred twenty-eight thousand, seven hundred nineteen".