77328517 has 6 divisors (see below), whose sum is σ = 89953638. Its totient is φ = 66281544.

The previous prime is 77328487. The next prime is 77328521. The reversal of 77328517 is 71582377.

It can be written as a sum of positive squares in only one way, i.e., 65707236 + 11621281 = 8106^2 + 3409^2 .

It is a de Polignac number, because none of the positive numbers 2^k-77328517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77328517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77322517) 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 in 5 ways as a sum of consecutive naturals, for example, 789018 + ... + 789115.

It is an arithmetic number, because the mean of its divisors is an integer number (14992273).

Almost surely, 2^77328517 is an apocalyptic number.

It is an amenable number.

77328517 is a deficient number, since it is larger than the sum of its proper divisors (12625121).

77328517 is a wasteful number, since it uses less digits than its factorization.

77328517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578147 (or 1578140 counting only the distinct ones).

The product of its digits is 82320, while the sum is 40.

The square root of 77328517 is about 8793.6634572856. The cubic root of 77328517 is about 426.0362569889.

The spelling of 77328517 in words is "seventy-seven million, three hundred twenty-eight thousand, five hundred seventeen".