82147905 has 32 divisors (see below), whose sum is σ = 166905600. Its totient is φ = 37552896.

The previous prime is 82147903. The next prime is 82147909. The reversal of 82147905 is 50974128.

It is not a de Polignac number, because 82147905 - 2¹ = 82147903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82147905.

It is not an unprimeable number, because it can be changed into a prime (82147903) 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 31 ways as a sum of consecutive naturals, for example, 42520 + ... + 44409.

It is an arithmetic number, because the mean of its divisors is an integer number (5215800).

Almost surely, 2^82147905 is an apocalyptic number.

It is an amenable number.

82147905 is an abundant number, since it is smaller than the sum of its proper divisors (84757695).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82147905 is a wasteful number, since it uses less digits than its factorization.

82147905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86950 (or 86944 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 82147905 is about 9063.5481462836. The cubic root of 82147905 is about 434.7091992199.

The spelling of 82147905 in words is "eighty-two million, one hundred forty-seven thousand, nine hundred five".