84712321 has 4 divisors (see below), whose sum is σ = 85976752. Its totient is φ = 83447892.

The previous prime is 84712291. The next prime is 84712363. The reversal of 84712321 is 12321748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84712321 - 2¹³ = 84704129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84712321.

It is not an unprimeable number, because it can be changed into a prime (84715321) 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, 632115 + ... + 632248.

It is an arithmetic number, because the mean of its divisors is an integer number (21494188).

Almost surely, 2^84712321 is an apocalyptic number.

It is an amenable number.

84712321 is a deficient number, since it is larger than the sum of its proper divisors (1264431).

84712321 is a wasteful number, since it uses less digits than its factorization.

84712321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264430.

The product of its digits is 2688, while the sum is 28.

The square root of 84712321 is about 9203.9296498832. The cubic root of 84712321 is about 439.1863769313.

The spelling of 84712321 in words is "eighty-four million, seven hundred twelve thousand, three hundred twenty-one".