75971977 has 2 divisors, whose sum is σ = 75971978. Its totient is φ = 75971976.

The previous prime is 75971923. The next prime is 75971981. The reversal of 75971977 is 77917957.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49716601 + 26255376 = 7051^2 + 5124^2 .

It is a cyclic number.

It is not a de Polignac number, because 75971977 - 2⁷ = 75971849 is a prime.

It is not a weakly prime, because it can be changed into another prime (75911977) 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 as a sum of consecutive naturals, namely, 37985988 + 37985989.

It is an arithmetic number, because the mean of its divisors is an integer number (37985989).

Almost surely, 2^75971977 is an apocalyptic number.

It is an amenable number.

75971977 is a deficient number, since it is larger than the sum of its proper divisors (1).

75971977 is an equidigital number, since it uses as much as digits as its factorization.

75971977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972405, while the sum is 52.

The square root of 75971977 is about 8716.1905096206. The cubic root of 75971977 is about 423.5302904095.

The spelling of 75971977 in words is "seventy-five million, nine hundred seventy-one thousand, nine hundred seventy-seven".