76780043 has 2 divisors, whose sum is σ = 76780044. Its totient is φ = 76780042.

The previous prime is 76780001. The next prime is 76780073. The reversal of 76780043 is 34008767.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 76780043 - 2⁶ = 76779979 is a prime.

It is equal to p_4492376 and since 76780043 and 4492376 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 76779985 and 76780012.

It is not a weakly prime, because it can be changed into another prime (76780073) 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, 38390021 + 38390022.

It is an arithmetic number, because the mean of its divisors is an integer number (38390022).

Almost surely, 2^76780043 is an apocalyptic number.

76780043 is a deficient number, since it is larger than the sum of its proper divisors (1).

76780043 is an equidigital number, since it uses as much as digits as its factorization.

76780043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 76780043 is about 8762.4222107817. The cubic root of 76780043 is about 425.0266059468.

The spelling of 76780043 in words is "seventy-six million, seven hundred eighty thousand, forty-three".