84986479 has 2 divisors, whose sum is σ = 84986480. Its totient is φ = 84986478.

The previous prime is 84986459. The next prime is 84986497. The reversal of 84986479 is 97468948.

Together with next prime (84986497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84986479 - 2²¹ = 82889327 is a prime.

It is a super-2 number, since 2×84986479² = 14445403225634882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84986459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42493239 + 42493240.

It is an arithmetic number, because the mean of its divisors is an integer number (42493240).

Almost surely, 2^84986479 is an apocalyptic number.

84986479 is a deficient number, since it is larger than the sum of its proper divisors (1).

84986479 is an equidigital number, since it uses as much as digits as its factorization.

84986479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 55.

The square root of 84986479 is about 9218.8111489497. The cubic root of 84986479 is about 439.6596524368.

The spelling of 84986479 in words is "eighty-four million, nine hundred eighty-six thousand, four hundred seventy-nine".