86674391 has 2 divisors, whose sum is σ = 86674392. Its totient is φ = 86674390.

The previous prime is 86674339. The next prime is 86674403. The reversal of 86674391 is 19347668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86674391 - 2¹⁴ = 86658007 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86674321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43337195 + 43337196.

It is an arithmetic number, because the mean of its divisors is an integer number (43337196).

Almost surely, 2^86674391 is an apocalyptic number.

86674391 is a deficient number, since it is larger than the sum of its proper divisors (1).

86674391 is an equidigital number, since it uses as much as digits as its factorization.

86674391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 86674391 is about 9309.9082165186. The cubic root of 86674391 is about 442.5512783840.

It can be divided in two parts, 866 and 74391, that added together give a palindrome (75257).

The spelling of 86674391 in words is "eighty-six million, six hundred seventy-four thousand, three hundred ninety-one".