77309713 has 8 divisors (see below), whose sum is σ = 83623400. Its totient is φ = 71048448.

The previous prime is 77309711. The next prime is 77309717. The reversal of 77309713 is 31790377.

It can be written as a sum of positive squares in 4 ways, for example, as 5602689 + 71707024 = 2367^2 + 8468^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77309713 - 2¹ = 77309711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77309711) 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 7 ways as a sum of consecutive naturals, for example, 10008 + ... + 15961.

It is an arithmetic number, because the mean of its divisors is an integer number (10452925).

Almost surely, 2^77309713 is an apocalyptic number.

It is an amenable number.

77309713 is a deficient number, since it is larger than the sum of its proper divisors (6313687).

77309713 is a wasteful number, since it uses less digits than its factorization.

77309713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26211.

The product of its (nonzero) digits is 27783, while the sum is 37.

The square root of 77309713 is about 8792.5942133138. The cubic root of 77309713 is about 426.0017210654.

The spelling of 77309713 in words is "seventy-seven million, three hundred nine thousand, seven hundred thirteen".