84916789 has 2 divisors, whose sum is σ = 84916790. Its totient is φ = 84916788.

The previous prime is 84916723. The next prime is 84916801. The reversal of 84916789 is 98761948.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84180625 + 736164 = 9175^2 + 858^2 .

It is a cyclic number.

It is not a de Polignac number, because 84916789 - 2¹⁷ = 84785717 is a prime.

It is a super-4 number, since 4×84916789⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84916709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42458394 + 42458395.

It is an arithmetic number, because the mean of its divisors is an integer number (42458395).

Almost surely, 2^84916789 is an apocalyptic number.

It is an amenable number.

84916789 is a deficient number, since it is larger than the sum of its proper divisors (1).

84916789 is an equidigital number, since it uses as much as digits as its factorization.

84916789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 84916789 is about 9215.0306022281. The cubic root of 84916789 is about 439.5394440602.

The spelling of 84916789 in words is "eighty-four million, nine hundred sixteen thousand, seven hundred eighty-nine".