84971429 has 2 divisors, whose sum is σ = 84971430. Its totient is φ = 84971428.

The previous prime is 84971417. The next prime is 84971449. The reversal of 84971429 is 92417948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68145025 + 16826404 = 8255^2 + 4102^2 .

It is a cyclic number.

It is not a de Polignac number, because 84971429 - 2⁴ = 84971413 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84971429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84971449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42485714 + 42485715.

It is an arithmetic number, because the mean of its divisors is an integer number (42485715).

Almost surely, 2^84971429 is an apocalyptic number.

It is an amenable number.

84971429 is a deficient number, since it is larger than the sum of its proper divisors (1).

84971429 is an equidigital number, since it uses as much as digits as its factorization.

84971429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 84971429 is about 9217.9948470370. The cubic root of 84971429 is about 439.6336982361.

The spelling of 84971429 in words is "eighty-four million, nine hundred seventy-one thousand, four hundred twenty-nine".