84866479 has 2 divisors, whose sum is σ = 84866480. Its totient is φ = 84866478.

The previous prime is 84866459. The next prime is 84866489. The reversal of 84866479 is 97466848.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84866479 - 2²³ = 76477871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84866449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42433239 + 42433240.

It is an arithmetic number, because the mean of its divisors is an integer number (42433240).

Almost surely, 2^84866479 is an apocalyptic number.

84866479 is a deficient number, since it is larger than the sum of its proper divisors (1).

84866479 is an equidigital number, since it uses as much as digits as its factorization.

84866479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 52.

The square root of 84866479 is about 9212.3004184623. The cubic root of 84866479 is about 439.4526233886.

The spelling of 84866479 in words is "eighty-four million, eight hundred sixty-six thousand, four hundred seventy-nine".