82239971 has 8 divisors (see below), whose sum is σ = 89828544. Its totient is φ = 74670120.

The previous prime is 82239953. The next prime is 82239991. The reversal of 82239971 is 17993228.

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 82239971 - 2¹⁸ = 81977827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82239901) 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, 5480 + ... + 13946.

It is an arithmetic number, because the mean of its divisors is an integer number (11228568).

Almost surely, 2^82239971 is an apocalyptic number.

82239971 is a deficient number, since it is larger than the sum of its proper divisors (7588573).

82239971 is a wasteful number, since it uses less digits than its factorization.

82239971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9361.

The product of its digits is 54432, while the sum is 41.

The square root of 82239971 is about 9068.6256400846. The cubic root of 82239971 is about 434.8715364705.

The spelling of 82239971 in words is "eighty-two million, two hundred thirty-nine thousand, nine hundred seventy-one".