82129898 has 4 divisors (see below), whose sum is σ = 123194850. Its totient is φ = 41064948.

The previous prime is 82129841. The next prime is 82129909. The reversal of 82129898 is 89892128.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 71351809 + 10778089 = 8447^2 + 3283^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20532473 + ... + 20532476.

Almost surely, 2^82129898 is an apocalyptic number.

82129898 is a deficient number, since it is larger than the sum of its proper divisors (41064952).

82129898 is a wasteful number, since it uses less digits than its factorization.

82129898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41064951.

The product of its digits is 165888, while the sum is 47.

The square root of 82129898 is about 9062.5547170762. The cubic root of 82129898 is about 434.6774338305.

The spelling of 82129898 in words is "eighty-two million, one hundred twenty-nine thousand, eight hundred ninety-eight".