76784161 has 2 divisors, whose sum is σ = 76784162. Its totient is φ = 76784160.

The previous prime is 76784137. The next prime is 76784171. The reversal of 76784161 is 16148767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76475025 + 309136 = 8745^2 + 556^2 .

It is an emirp because it is prime and its reverse (16148767) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76784161 - 2⁷ = 76784033 is a prime.

It is not a weakly prime, because it can be changed into another prime (76784171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38392080 + 38392081.

It is an arithmetic number, because the mean of its divisors is an integer number (38392081).

Almost surely, 2^76784161 is an apocalyptic number.

It is an amenable number.

76784161 is a deficient number, since it is larger than the sum of its proper divisors (1).

76784161 is an equidigital number, since it uses as much as digits as its factorization.

76784161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 76784161 is about 8762.6571883191. The cubic root of 76784161 is about 425.0342043982.

The spelling of 76784161 in words is "seventy-six million, seven hundred eighty-four thousand, one hundred sixty-one".