77600891 has 2 divisors, whose sum is σ = 77600892. Its totient is φ = 77600890.

The previous prime is 77600879. The next prime is 77600909. The reversal of 77600891 is 19800677.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77600891 - 2²² = 73406587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77600191) 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, 38800445 + 38800446.

It is an arithmetic number, because the mean of its divisors is an integer number (38800446).

Almost surely, 2^77600891 is an apocalyptic number.

77600891 is a deficient number, since it is larger than the sum of its proper divisors (1).

77600891 is an equidigital number, since it uses as much as digits as its factorization.

77600891 is an odious number, because the sum of its binary digits is odd.

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

The square root of 77600891 is about 8809.1367908553. The cubic root of 77600891 is about 426.5358795778.

The spelling of 77600891 in words is "seventy-seven million, six hundred thousand, eight hundred ninety-one".