82620791 has 8 divisors (see below), whose sum is σ = 90601104. Its totient is φ = 74718720.

The previous prime is 82620787. The next prime is 82620809. The reversal of 82620791 is 19702628.

It is a happy number.

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 82620791 - 2² = 82620787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82620751) 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, 17336 + ... + 21581.

It is an arithmetic number, because the mean of its divisors is an integer number (11325138).

Almost surely, 2^82620791 is an apocalyptic number.

82620791 is a deficient number, since it is larger than the sum of its proper divisors (7980313).

82620791 is a wasteful number, since it uses less digits than its factorization.

82620791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39121.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 82620791 is about 9089.5979559054. The cubic root of 82620791 is about 435.5417410406.

The spelling of 82620791 in words is "eighty-two million, six hundred twenty thousand, seven hundred ninety-one".