82420791 has 8 divisors (see below), whose sum is σ = 109991280. Its totient is φ = 54898752.

The previous prime is 82420771. The next prime is 82420829. The reversal of 82420791 is 19702428.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82420791 - 2⁵ = 82420759 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82420771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7936 + ... + 15093.

It is an arithmetic number, because the mean of its divisors is an integer number (13748910).

Almost surely, 2^82420791 is an apocalyptic number.

82420791 is a deficient number, since it is larger than the sum of its proper divisors (27570489).

82420791 is a wasteful number, since it uses less digits than its factorization.

82420791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24225.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 82420791 is about 9078.5897032524. The cubic root of 82420791 is about 435.1900187138.

The spelling of 82420791 in words is "eighty-two million, four hundred twenty thousand, seven hundred ninety-one".