82412905 has 4 divisors (see below), whose sum is σ = 98895492. Its totient is φ = 65930320.

The previous prime is 82412903. The next prime is 82412909. The reversal of 82412905 is 50921428.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14992384 + 67420521 = 3872^2 + 8211^2 .

It is not a de Polignac number, because 82412905 - 2¹ = 82412903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82412903) 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, 8241286 + ... + 8241295.

It is an arithmetic number, because the mean of its divisors is an integer number (24723873).

Almost surely, 2^82412905 is an apocalyptic number.

It is an amenable number.

82412905 is a deficient number, since it is larger than the sum of its proper divisors (16482587).

82412905 is a wasteful number, since it uses less digits than its factorization.

82412905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16482586.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 82412905 is about 9078.1553743037. The cubic root of 82412905 is about 435.1761386482.

The spelling of 82412905 in words is "eighty-two million, four hundred twelve thousand, nine hundred five".