84673681 has 2 divisors, whose sum is σ = 84673682. Its totient is φ = 84673680.

The previous prime is 84673661. The next prime is 84673717. The reversal of 84673681 is 18637648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80263681 + 4410000 = 8959^2 + 2100^2 .

It is a cyclic number.

It is not a de Polignac number, because 84673681 - 2¹³ = 84665489 is a prime.

It is a super-2 number, since 2×84673681² = 14339264508179522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84673661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42336840 + 42336841.

It is an arithmetic number, because the mean of its divisors is an integer number (42336841).

Almost surely, 2^84673681 is an apocalyptic number.

It is an amenable number.

84673681 is a deficient number, since it is larger than the sum of its proper divisors (1).

84673681 is an equidigital number, since it uses as much as digits as its factorization.

84673681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 84673681 is about 9201.8303070639. The cubic root of 84673681 is about 439.1195911231.

The spelling of 84673681 in words is "eighty-four million, six hundred seventy-three thousand, six hundred eighty-one".