84747213 has 6 divisors (see below), whose sum is σ = 122412654. Its totient is φ = 56498136.

The previous prime is 84747209. The next prime is 84747217. The reversal of 84747213 is 31274748.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (84747209) and next prime (84747217).

It can be written as a sum of positive squares in only one way, i.e., 66879684 + 17867529 = 8178^2 + 4227^2 .

It is not a de Polignac number, because 84747213 - 2² = 84747209 is a prime.

It is a super-2 number, since 2×84747213² = 14364180222534738, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84747217) 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 in 5 ways as a sum of consecutive naturals, for example, 4708170 + ... + 4708187.

It is an arithmetic number, because the mean of its divisors is an integer number (20402109).

Almost surely, 2^84747213 is an apocalyptic number.

It is an amenable number.

84747213 is a deficient number, since it is larger than the sum of its proper divisors (37665441).

84747213 is a wasteful number, since it uses less digits than its factorization.

84747213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9416363 (or 9416360 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 84747213 is about 9205.8249494546. The cubic root of 84747213 is about 439.2466672072.

The spelling of 84747213 in words is "eighty-four million, seven hundred forty-seven thousand, two hundred thirteen".