82267991 has 8 divisors (see below), whose sum is σ = 88742304. Its totient is φ = 75814560.

The previous prime is 82267973. The next prime is 82268003. The reversal of 82267991 is 19976228.

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 82267991 - 2²² = 78073687 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 (82267921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3521 + ... + 13301.

It is an arithmetic number, because the mean of its divisors is an integer number (11092788).

Almost surely, 2^82267991 is an apocalyptic number.

82267991 is a deficient number, since it is larger than the sum of its proper divisors (6474313).

82267991 is a wasteful number, since it uses less digits than its factorization.

82267991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10441.

The product of its digits is 108864, while the sum is 44.

The square root of 82267991 is about 9070.1703953123. The cubic root of 82267991 is about 434.9209192572.

The spelling of 82267991 in words is "eighty-two million, two hundred sixty-seven thousand, nine hundred ninety-one".