84567321 has 10 divisors (see below), whose sum is σ = 126329082. Its totient is φ = 56378160.

The previous prime is 84567253. The next prime is 84567337. The reversal of 84567321 is 12376548.

It can be written as a sum of positive squares in only one way, i.e., 84437721 + 129600 = 9189^2 + 360^2 .

It is not a de Polignac number, because 84567321 - 2⁷ = 84567193 is a prime.

It is a super-2 number, since 2×84567321² = 14303263562234082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84567391) 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 9 ways as a sum of consecutive naturals, for example, 521940 + ... + 522101.

Almost surely, 2^84567321 is an apocalyptic number.

84567321 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

84567321 is a deficient number, since it is larger than the sum of its proper divisors (41761761).

84567321 is a wasteful number, since it uses less digits than its factorization.

84567321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044053 (or 1044044 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 84567321 is about 9196.0492060450. The cubic root of 84567321 is about 438.9356523110.

The spelling of 84567321 in words is "eighty-four million, five hundred sixty-seven thousand, three hundred twenty-one".