82307081 has 4 divisors (see below), whose sum is σ = 87148692. Its totient is φ = 77465472.

The previous prime is 82307063. The next prime is 82307089. The reversal of 82307081 is 18070328.

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 53523856 + 28783225 = 7316^2 + 5365^2 .

It is a cyclic number.

It is not a de Polignac number, because 82307081 - 2¹⁰ = 82306057 is a prime.

It is a super-2 number, since 2×82307081² = 13548911165481122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82307089) 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, 2420780 + ... + 2420813.

It is an arithmetic number, because the mean of its divisors is an integer number (21787173).

Almost surely, 2^82307081 is an apocalyptic number.

It is an amenable number.

82307081 is a deficient number, since it is larger than the sum of its proper divisors (4841611).

82307081 is a wasteful number, since it uses less digits than its factorization.

82307081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4841610.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 82307081 is about 9072.3250052013. The cubic root of 82307081 is about 434.9897932163.

The spelling of 82307081 in words is "eighty-two million, three hundred seven thousand, eighty-one".