82120237 has 4 divisors (see below), whose sum is σ = 82157436. Its totient is φ = 82083040.

The previous prime is 82120231. The next prime is 82120249. The reversal of 82120237 is 73202128.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13329801 + 68790436 = 3651^2 + 8294^2 .

It is a cyclic number.

It is not a de Polignac number, because 82120237 - 2¹⁵ = 82087469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82120231) 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 3 ways as a sum of consecutive naturals, for example, 15064 + ... + 19777.

It is an arithmetic number, because the mean of its divisors is an integer number (20539359).

Almost surely, 2^82120237 is an apocalyptic number.

It is an amenable number.

82120237 is a deficient number, since it is larger than the sum of its proper divisors (37199).

82120237 is a wasteful number, since it uses less digits than its factorization.

82120237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37198.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 82120237 is about 9062.0216839290. The cubic root of 82120237 is about 434.6603893539.

The spelling of 82120237 in words is "eighty-two million, one hundred twenty thousand, two hundred thirty-seven".