77530613 has 2 divisors, whose sum is σ = 77530614. Its totient is φ = 77530612.

The previous prime is 77530603. The next prime is 77530619. The reversal of 77530613 is 31603577.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62615569 + 14915044 = 7913^2 + 3862^2 .

It is an emirp because it is prime and its reverse (31603577) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77530613 - 2⁸ = 77530357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_4533728 and since 77530613 and 4533728 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77530613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77530619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38765306 + 38765307.

It is an arithmetic number, because the mean of its divisors is an integer number (38765307).

Almost surely, 2^77530613 is an apocalyptic number.

It is an amenable number.

77530613 is a deficient number, since it is larger than the sum of its proper divisors (1).

77530613 is an equidigital number, since it uses as much as digits as its factorization.

77530613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 32.

The square root of 77530613 is about 8805.1469607270. The cubic root of 77530613 is about 426.4070788994.

The spelling of 77530613 in words is "seventy-seven million, five hundred thirty thousand, six hundred thirteen".