84475679 has 2 divisors, whose sum is σ = 84475680. Its totient is φ = 84475678.

The previous prime is 84475663. The next prime is 84475681. The reversal of 84475679 is 97657448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84475679 - 2⁴ = 84475663 is a prime.

It is a super-2 number, since 2×84475679² = 14272280685022082, which contains 22 as substring.

Together with 84475681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84475639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42237839 + 42237840.

It is an arithmetic number, because the mean of its divisors is an integer number (42237840).

Almost surely, 2^84475679 is an apocalyptic number.

84475679 is a deficient number, since it is larger than the sum of its proper divisors (1).

84475679 is an equidigital number, since it uses as much as digits as its factorization.

84475679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 84475679 is about 9191.0651722202. The cubic root of 84475679 is about 438.7770430541. Note that the first 3 decimals are identical.

The spelling of 84475679 in words is "eighty-four million, four hundred seventy-five thousand, six hundred seventy-nine".