75782081 has 2 divisors, whose sum is σ = 75782082. Its totient is φ = 75782080.

The previous prime is 75782027. The next prime is 75782087. The reversal of 75782081 is 18028757.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43349056 + 32433025 = 6584^2 + 5695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75782081 is a prime.

It is a super-2 number, since 2×75782081² = 11485847601381122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75782087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37891040 + 37891041.

It is an arithmetic number, because the mean of its divisors is an integer number (37891041).

Almost surely, 2^75782081 is an apocalyptic number.

It is an amenable number.

75782081 is a deficient number, since it is larger than the sum of its proper divisors (1).

75782081 is an equidigital number, since it uses as much as digits as its factorization.

75782081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 75782081 is about 8705.2904029676. The cubic root of 75782081 is about 423.1771171532.

The spelling of 75782081 in words is "seventy-five million, seven hundred eighty-two thousand, eighty-one".