84861769 has 2 divisors, whose sum is σ = 84861770. Its totient is φ = 84861768.

The previous prime is 84861761. The next prime is 84861779. The reversal of 84861769 is 96716848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70761744 + 14100025 = 8412^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 84861769 - 2³ = 84861761 is a prime.

It is a super-2 number, since 2×84861769² = 14403039675618722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84861761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42430884 + 42430885.

It is an arithmetic number, because the mean of its divisors is an integer number (42430885).

Almost surely, 2^84861769 is an apocalyptic number.

It is an amenable number.

84861769 is a deficient number, since it is larger than the sum of its proper divisors (1).

84861769 is an equidigital number, since it uses as much as digits as its factorization.

84861769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 84861769 is about 9212.0447784409. The cubic root of 84861769 is about 439.4444935193. Note that the first 4 decimals are identical.

The spelling of 84861769 in words is "eighty-four million, eight hundred sixty-one thousand, seven hundred sixty-nine".