84467723581 has 2 divisors, whose sum is σ = 84467723582. Its totient is φ = 84467723580.

The previous prime is 84467723551. The next prime is 84467723657. The reversal of 84467723581 is 18532776448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67773791556 + 16693932025 = 260334^2 + 129205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84467723581 is a prime.

It is a super-2 number, since 2×84467723581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84467723551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42233861790 + 42233861791.

It is an arithmetic number, because the mean of its divisors is an integer number (42233861791).

Almost surely, 2^84467723581 is an apocalyptic number.

It is an amenable number.

84467723581 is a deficient number, since it is larger than the sum of its proper divisors (1).

84467723581 is an equidigital number, since it uses as much as digits as its factorization.

84467723581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9031680, while the sum is 55.

The spelling of 84467723581 in words is "eighty-four billion, four hundred sixty-seven million, seven hundred twenty-three thousand, five hundred eighty-one".