84080681 has 4 divisors (see below), whose sum is σ = 88506000. Its totient is φ = 79655364.

The previous prime is 84080671. The next prime is 84080693. The reversal of 84080681 is 18608048.

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 84080681 - 2²² = 79886377 is a prime.

It is a super-2 number, since 2×84080681² = 14139121834847522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84080641) 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, 2212631 + ... + 2212668.

It is an arithmetic number, because the mean of its divisors is an integer number (22126500).

Almost surely, 2^84080681 is an apocalyptic number.

It is an amenable number.

84080681 is a deficient number, since it is larger than the sum of its proper divisors (4425319).

84080681 is a wasteful number, since it uses less digits than its factorization.

84080681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425318.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 84080681 is about 9169.5518429201. The cubic root of 84080681 is about 438.0920849874.

The spelling of 84080681 in words is "eighty-four million, eighty thousand, six hundred eighty-one".