76705891 has 2 divisors, whose sum is σ = 76705892. Its totient is φ = 76705890.

The previous prime is 76705879. The next prime is 76705931. The reversal of 76705891 is 19850767.

It is a weak prime.

It is an emirp because it is prime and its reverse (19850767) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76705891 - 2⁵ = 76705859 is a prime.

It is not a weakly prime, because it can be changed into another prime (76705801) 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, 38352945 + 38352946.

It is an arithmetic number, because the mean of its divisors is an integer number (38352946).

Almost surely, 2^76705891 is an apocalyptic number.

76705891 is a deficient number, since it is larger than the sum of its proper divisors (1).

76705891 is an equidigital number, since it uses as much as digits as its factorization.

76705891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 76705891 is about 8758.1899385661. The cubic root of 76705891 is about 424.8897356394.

The spelling of 76705891 in words is "seventy-six million, seven hundred five thousand, eight hundred ninety-one".