82421899 has 8 divisors (see below), whose sum is σ = 99737568. Its totient is φ = 66491520.

The previous prime is 82421893. The next prime is 82421917. The reversal of 82421899 is 99812428.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82421899 - 2¹³ = 82413707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82421893) 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 in 7 ways as a sum of consecutive naturals, for example, 346192 + ... + 346429.

It is an arithmetic number, because the mean of its divisors is an integer number (12467196).

Almost surely, 2^82421899 is an apocalyptic number.

82421899 is a deficient number, since it is larger than the sum of its proper divisors (17315669).

82421899 is a wasteful number, since it uses less digits than its factorization.

82421899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692645.

The product of its digits is 82944, while the sum is 43.

The square root of 82421899 is about 9078.6507257411. The cubic root of 82421899 is about 435.1919688220.

The spelling of 82421899 in words is "eighty-two million, four hundred twenty-one thousand, eight hundred ninety-nine".