82445147 has 4 divisors (see below), whose sum is σ = 84362520. Its totient is φ = 80527776.

The previous prime is 82445141. The next prime is 82445159. The reversal of 82445147 is 74154428.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82445147 - 2¹⁴ = 82428763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82445141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958622 + ... + 958707.

It is an arithmetic number, because the mean of its divisors is an integer number (21090630).

Almost surely, 2^82445147 is an apocalyptic number.

82445147 is a deficient number, since it is larger than the sum of its proper divisors (1917373).

82445147 is a wasteful number, since it uses less digits than its factorization.

82445147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917372.

The product of its digits is 35840, while the sum is 35.

The square root of 82445147 is about 9079.9310019405. The cubic root of 82445147 is about 435.2328818638.

The spelling of 82445147 in words is "eighty-two million, four hundred forty-five thousand, one hundred forty-seven".