76388891 has 2 divisors, whose sum is σ = 76388892. Its totient is φ = 76388890.

The previous prime is 76388887. The next prime is 76388899. The reversal of 76388891 is 19888367.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19888367) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76388891 - 2² = 76388887 is a prime.

It is not a weakly prime, because it can be changed into another prime (76388899) 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, 38194445 + 38194446.

It is an arithmetic number, because the mean of its divisors is an integer number (38194446).

Almost surely, 2^76388891 is an apocalyptic number.

76388891 is a deficient number, since it is larger than the sum of its proper divisors (1).

76388891 is an equidigital number, since it uses as much as digits as its factorization.

76388891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 76388891 is about 8740.0738555232. The cubic root of 76388891 is about 424.3036180470.

The spelling of 76388891 in words is "seventy-six million, three hundred eighty-eight thousand, eight hundred ninety-one".