99999982 has 4 divisors (see below), whose sum is σ = 149999976. Its totient is φ = 49999990.

The previous prime is 99999971. The next prime is 99999989. The reversal of 99999982 is 28999999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28999999 = 7 ⋅4142857.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999994 + ... + 24999997.

It is an arithmetic number, because the mean of its divisors is an integer number (37499994).

Almost surely, 2^99999982 is an apocalyptic number.

99999982 is a deficient number, since it is larger than the sum of its proper divisors (49999994).

99999982 is a wasteful number, since it uses less digits than its factorization.

99999982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49999993.

The product of its digits is 8503056, while the sum is 64.

The square root of 99999982 is about 9999.9991000000. Note that the first 3 decimals coincide. The cubic root of 99999982 is about 464.1588555117.

It can be divided in two parts, 9999998 and 2, that added together give a 7-th power (10000000 = 10⁷).

The spelling of 99999982 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-two".