86673409 has 2 divisors, whose sum is σ = 86673410. Its totient is φ = 86673408.

The previous prime is 86673403. The next prime is 86673443. The reversal of 86673409 is 90437668.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85507009 + 1166400 = 9247^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 86673409 - 2³ = 86673401 is a prime.

It is not a weakly prime, because it can be changed into another prime (86673401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43336704 + 43336705.

It is an arithmetic number, because the mean of its divisors is an integer number (43336705).

Almost surely, 2^86673409 is an apocalyptic number.

It is an amenable number.

86673409 is a deficient number, since it is larger than the sum of its proper divisors (1).

86673409 is an equidigital number, since it uses as much as digits as its factorization.

86673409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 86673409 is about 9309.8554768589. The cubic root of 86673409 is about 442.5496070445.

The spelling of 86673409 in words is "eighty-six million, six hundred seventy-three thousand, four hundred nine".