77685743 has 8 divisors (see below), whose sum is σ = 81515616. Its totient is φ = 73893600.

The previous prime is 77685709. The next prime is 77685749. The reversal of 77685743 is 34758677.

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 77685743 - 2⁶ = 77685679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77685749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5168 + ... + 13493.

It is an arithmetic number, because the mean of its divisors is an integer number (10189452).

Almost surely, 2^77685743 is an apocalyptic number.

77685743 is a deficient number, since it is larger than the sum of its proper divisors (3829873).

77685743 is a wasteful number, since it uses less digits than its factorization.

77685743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18865.

The product of its digits is 987840, while the sum is 47.

The square root of 77685743 is about 8813.9516109405. The cubic root of 77685743 is about 426.6912868958.

The spelling of 77685743 in words is "seventy-seven million, six hundred eighty-five thousand, seven hundred forty-three".