84677429 has 2 divisors, whose sum is σ = 84677430. Its totient is φ = 84677428.

The previous prime is 84677407. The next prime is 84677431. The reversal of 84677429 is 92477648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84676804 + 625 = 9202^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 84677429 - 2²⁴ = 67900213 is a prime.

It is a Sophie Germain prime.

Together with 84677431, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84676429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42338714 + 42338715.

It is an arithmetic number, because the mean of its divisors is an integer number (42338715).

Almost surely, 2^84677429 is an apocalyptic number.

It is an amenable number.

84677429 is a deficient number, since it is larger than the sum of its proper divisors (1).

84677429 is an equidigital number, since it uses as much as digits as its factorization.

84677429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 84677429 is about 9202.0339599460. The cubic root of 84677429 is about 439.1260700979.

The spelling of 84677429 in words is "eighty-four million, six hundred seventy-seven thousand, four hundred twenty-nine".