82126399 has 4 divisors (see below), whose sum is σ = 85697136. Its totient is φ = 78555664.

The previous prime is 82126393. The next prime is 82126423. The reversal of 82126399 is 99362128.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 82126399 - 2³ = 82126391 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 (82126391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785334 + ... + 1785379.

It is an arithmetic number, because the mean of its divisors is an integer number (21424284).

Almost surely, 2^82126399 is an apocalyptic number.

82126399 is a deficient number, since it is larger than the sum of its proper divisors (3570737).

82126399 is a wasteful number, since it uses less digits than its factorization.

82126399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570736.

The product of its digits is 46656, while the sum is 40.

The square root of 82126399 is about 9062.3616679098. The cubic root of 82126399 is about 434.6712608533.

The spelling of 82126399 in words is "eighty-two million, one hundred twenty-six thousand, three hundred ninety-nine".