77353891 has 2 divisors, whose sum is σ = 77353892. Its totient is φ = 77353890.

The previous prime is 77353879. The next prime is 77353901. The reversal of 77353891 is 19835377.

It is a strong prime.

It is an emirp because it is prime and its reverse (19835377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77353891 - 2⁷ = 77353763 is a prime.

It is not a weakly prime, because it can be changed into another prime (77353841) 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, 38676945 + 38676946.

It is an arithmetic number, because the mean of its divisors is an integer number (38676946).

Almost surely, 2^77353891 is an apocalyptic number.

77353891 is a deficient number, since it is larger than the sum of its proper divisors (1).

77353891 is an equidigital number, since it uses as much as digits as its factorization.

77353891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 43.

The square root of 77353891 is about 8795.1060823619. The cubic root of 77353891 is about 426.0828506744.

The spelling of 77353891 in words is "seventy-seven million, three hundred fifty-three thousand, eight hundred ninety-one".