84135479 has 2 divisors, whose sum is σ = 84135480. Its totient is φ = 84135478.

The previous prime is 84135461. The next prime is 84135503. The reversal of 84135479 is 97453148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84135479 - 2¹⁶ = 84069943 is a prime.

It is a Sophie Germain 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 (84135419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42067739 + 42067740.

It is an arithmetic number, because the mean of its divisors is an integer number (42067740).

Almost surely, 2^84135479 is an apocalyptic number.

84135479 is a deficient number, since it is larger than the sum of its proper divisors (1).

84135479 is an equidigital number, since it uses as much as digits as its factorization.

84135479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 84135479 is about 9172.5393975714. The cubic root of 84135479 is about 438.1872370739.

The spelling of 84135479 in words is "eighty-four million, one hundred thirty-five thousand, four hundred seventy-nine".