82078345 has 4 divisors (see below), whose sum is σ = 98494020. Its totient is φ = 65662672.

The previous prime is 82078327. The next prime is 82078369. The reversal of 82078345 is 54387028.

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 42237001 + 39841344 = 6499^2 + 6312^2 .

It is a cyclic number.

It is not a de Polignac number, because 82078345 - 2⁵ = 82078313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8207830 + ... + 8207839.

It is an arithmetic number, because the mean of its divisors is an integer number (24623505).

Almost surely, 2^82078345 is an apocalyptic number.

It is an amenable number.

82078345 is a deficient number, since it is larger than the sum of its proper divisors (16415675).

82078345 is a wasteful number, since it uses less digits than its factorization.

82078345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16415674.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 82078345 is about 9059.7099843207. The cubic root of 82078345 is about 434.5864656746.

The spelling of 82078345 in words is "eighty-two million, seventy-eight thousand, three hundred forty-five".