84247129 has 2 divisors, whose sum is σ = 84247130. Its totient is φ = 84247128.

The previous prime is 84247067. The next prime is 84247147. The reversal of 84247129 is 92174248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61465600 + 22781529 = 7840^2 + 4773^2 .

It is a cyclic number.

It is not a de Polignac number, because 84247129 - 2¹³ = 84238937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84245129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42123564 + 42123565.

It is an arithmetic number, because the mean of its divisors is an integer number (42123565).

Almost surely, 2^84247129 is an apocalyptic number.

It is an amenable number.

84247129 is a deficient number, since it is larger than the sum of its proper divisors (1).

84247129 is an equidigital number, since it uses as much as digits as its factorization.

84247129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 84247129 is about 9178.6234806751. The cubic root of 84247129 is about 438.3809800725.

The spelling of 84247129 in words is "eighty-four million, two hundred forty-seven thousand, one hundred twenty-nine".