77328191 has 2 divisors, whose sum is σ = 77328192. Its totient is φ = 77328190.

The previous prime is 77328161. The next prime is 77328203. The reversal of 77328191 is 19182377.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77328191 - 2¹⁰ = 77327167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77328101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38664095 + 38664096.

It is an arithmetic number, because the mean of its divisors is an integer number (38664096).

Almost surely, 2^77328191 is an apocalyptic number.

77328191 is a deficient number, since it is larger than the sum of its proper divisors (1).

77328191 is an equidigital number, since it uses as much as digits as its factorization.

77328191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 38.

The square root of 77328191 is about 8793.6449211917. The cubic root of 77328191 is about 426.0356582963.

The spelling of 77328191 in words is "seventy-seven million, three hundred twenty-eight thousand, one hundred ninety-one".