84870469 has 2 divisors, whose sum is σ = 84870470. Its totient is φ = 84870468.

The previous prime is 84870439. The next prime is 84870479. The reversal of 84870469 is 96407848.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79441569 + 5428900 = 8913^2 + 2330^2 .

It is a cyclic number.

It is not a de Polignac number, because 84870469 - 2⁹ = 84869957 is a prime.

It is a super-2 number, since 2×84870469² = 14405993016559922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84870439) 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, 42435234 + 42435235.

It is an arithmetic number, because the mean of its divisors is an integer number (42435235).

Almost surely, 2^84870469 is an apocalyptic number.

It is an amenable number.

84870469 is a deficient number, since it is larger than the sum of its proper divisors (1).

84870469 is an equidigital number, since it uses as much as digits as its factorization.

84870469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 84870469 is about 9212.5169742042. The cubic root of 84870469 is about 439.4595102400.

It can be divided in two parts, 848 and 70469, that added together give a palindrome (71317).

The spelling of 84870469 in words is "eighty-four million, eight hundred seventy thousand, four hundred sixty-nine".