82448921 has 2 divisors, whose sum is σ = 82448922. Its totient is φ = 82448920.

The previous prime is 82448917. The next prime is 82448959. The reversal of 82448921 is 12984428.

It is an a-pointer prime, because the next prime (82448959) can be obtained adding 82448921 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41744521 + 40704400 = 6461^2 + 6380^2 .

It is a cyclic number.

It is not a de Polignac number, because 82448921 - 2² = 82448917 is a prime.

It is not a weakly prime, because it can be changed into another prime (82447921) 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, 41224460 + 41224461.

It is an arithmetic number, because the mean of its divisors is an integer number (41224461).

Almost surely, 2^82448921 is an apocalyptic number.

It is an amenable number.

82448921 is a deficient number, since it is larger than the sum of its proper divisors (1).

82448921 is an equidigital number, since it uses as much as digits as its factorization.

82448921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 38.

The square root of 82448921 is about 9080.1388205247. The cubic root of 82448921 is about 435.2395228200.

The spelling of 82448921 in words is "eighty-two million, four hundred forty-eight thousand, nine hundred twenty-one".