84275909 has 2 divisors, whose sum is σ = 84275910. Its totient is φ = 84275908.

The previous prime is 84275897. The next prime is 84275921. The reversal of 84275909 is 90957248.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (84275897) and next prime (84275921).

It can be written as a sum of positive squares in only one way, i.e., 73530625 + 10745284 = 8575^2 + 3278^2 .

It is a cyclic number.

It is not a de Polignac number, because 84275909 - 2¹² = 84271813 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 84275909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84275999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42137954 + 42137955.

It is an arithmetic number, because the mean of its divisors is an integer number (42137955).

Almost surely, 2^84275909 is an apocalyptic number.

It is an amenable number.

84275909 is a deficient number, since it is larger than the sum of its proper divisors (1).

84275909 is an equidigital number, since it uses as much as digits as its factorization.

84275909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 84275909 is about 9180.1911200149. The cubic root of 84275909 is about 438.4308934182.

It can be divided in two parts, 84275 and 909, that added together give a cube (85184 = 44³).

The spelling of 84275909 in words is "eighty-four million, two hundred seventy-five thousand, nine hundred nine".