84321617 has 4 divisors (see below), whose sum is σ = 85067940. Its totient is φ = 83575296.

The previous prime is 84321613. The next prime is 84321641. The reversal of 84321617 is 71612348.

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 6599761 + 77721856 = 2569^2 + 8816^2 .

It is a cyclic number.

It is not a de Polignac number, because 84321617 - 2² = 84321613 is a prime.

It is a super-2 number, since 2×84321617² = 14220270186989378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84321613) 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, 372992 + ... + 373217.

It is an arithmetic number, because the mean of its divisors is an integer number (21266985).

Almost surely, 2^84321617 is an apocalyptic number.

It is an amenable number.

84321617 is a deficient number, since it is larger than the sum of its proper divisors (746323).

84321617 is a wasteful number, since it uses less digits than its factorization.

84321617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746322.

The product of its digits is 8064, while the sum is 32.

The square root of 84321617 is about 9182.6802732100. The cubic root of 84321617 is about 438.5101417572.

The spelling of 84321617 in words is "eighty-four million, three hundred twenty-one thousand, six hundred seventeen".