77345377 has 4 divisors (see below), whose sum is σ = 78613396. Its totient is φ = 76077360.

The previous prime is 77345351. The next prime is 77345381. The reversal of 77345377 is 77354377.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45037521 + 32307856 = 6711^2 + 5684^2 .

It is a cyclic number.

It is not a de Polignac number, because 77345377 - 2⁷ = 77345249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77345327) 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 in 3 ways as a sum of consecutive naturals, for example, 633918 + ... + 634039.

It is an arithmetic number, because the mean of its divisors is an integer number (19653349).

Almost surely, 2^77345377 is an apocalyptic number.

It is an amenable number.

77345377 is a deficient number, since it is larger than the sum of its proper divisors (1268019).

77345377 is a wasteful number, since it uses less digits than its factorization.

77345377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268018.

The product of its digits is 432180, while the sum is 43.

The square root of 77345377 is about 8794.6220498666. The cubic root of 77345377 is about 426.0672177504.

The spelling of 77345377 in words is "seventy-seven million, three hundred forty-five thousand, three hundred seventy-seven".