82121367 has 8 divisors (see below), whose sum is σ = 109812096. Its totient is φ = 54589112.

The previous prime is 82121353. The next prime is 82121371. The reversal of 82121367 is 76312128.

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 82121367 - 2⁷ = 82121239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82121317) 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, 38403 + ... + 40484.

It is an arithmetic number, because the mean of its divisors is an integer number (13726512).

Almost surely, 2^82121367 is an apocalyptic number.

82121367 is a deficient number, since it is larger than the sum of its proper divisors (27690729).

82121367 is a wasteful number, since it uses less digits than its factorization.

82121367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79237.

The product of its digits is 4032, while the sum is 30.

The square root of 82121367 is about 9062.0840318329. The cubic root of 82121367 is about 434.6623830321.

The spelling of 82121367 in words is "eighty-two million, one hundred twenty-one thousand, three hundred sixty-seven".