84713729 has 2 divisors, whose sum is σ = 84713730. Its totient is φ = 84713728.

The previous prime is 84713711. The next prime is 84713773. The reversal of 84713729 is 92731748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54760000 + 29953729 = 7400^2 + 5473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84713729 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84713779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42356864 + 42356865.

It is an arithmetic number, because the mean of its divisors is an integer number (42356865).

Almost surely, 2^84713729 is an apocalyptic number.

It is an amenable number.

84713729 is a deficient number, since it is larger than the sum of its proper divisors (1).

84713729 is an equidigital number, since it uses as much as digits as its factorization.

84713729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 84713729 is about 9204.0061386333. The cubic root of 84713729 is about 439.1888101507.

The spelling of 84713729 in words is "eighty-four million, seven hundred thirteen thousand, seven hundred twenty-nine".