82163945 has 8 divisors (see below), whose sum is σ = 98919744. Its totient is φ = 65515824.

The previous prime is 82163929. The next prime is 82163951. The reversal of 82163945 is 54936128.

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 82163945 - 2⁴ = 82163929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82163899 and 82163908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25229 + ... + 28298.

It is an arithmetic number, because the mean of its divisors is an integer number (12364968).

Almost surely, 2^82163945 is an apocalyptic number.

It is an amenable number.

82163945 is a deficient number, since it is larger than the sum of its proper divisors (16755799).

82163945 is a wasteful number, since it uses less digits than its factorization.

82163945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53839.

The product of its digits is 51840, while the sum is 38.

The square root of 82163945 is about 9064.4329662699. The cubic root of 82163945 is about 434.7374907987.

The spelling of 82163945 in words is "eighty-two million, one hundred sixty-three thousand, nine hundred forty-five".