84179213 has 4 divisors (see below), whose sum is σ = 84217980. Its totient is φ = 84140448.

The previous prime is 84179171. The next prime is 84179243. The reversal of 84179213 is 31297148.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66227044 + 17952169 = 8138^2 + 4237^2 .

It is a cyclic number.

It is not a de Polignac number, because 84179213 - 2¹⁸ = 83917069 is a prime.

It is a super-2 number, since 2×84179213² = 14172279802598738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84179243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15920 + ... + 20537.

It is an arithmetic number, because the mean of its divisors is an integer number (21054495).

Almost surely, 2^84179213 is an apocalyptic number.

It is an amenable number.

84179213 is a deficient number, since it is larger than the sum of its proper divisors (38767).

84179213 is a wasteful number, since it uses less digits than its factorization.

84179213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38766.

The product of its digits is 12096, while the sum is 35.

The square root of 84179213 is about 9174.9230514484. The cubic root of 84179213 is about 438.2631478207.

The spelling of 84179213 in words is "eighty-four million, one hundred seventy-nine thousand, two hundred thirteen".