77320871 has 8 divisors (see below), whose sum is σ = 80805600. Its totient is φ = 73846432.

The previous prime is 77320849. The next prime is 77320877. The reversal of 77320871 is 17802377.

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 77320871 - 2⁶ = 77320807 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 (77320877) 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, 15605 + ... + 19953.

It is an arithmetic number, because the mean of its divisors is an integer number (10100700).

Almost surely, 2^77320871 is an apocalyptic number.

77320871 is a deficient number, since it is larger than the sum of its proper divisors (3484729).

77320871 is a wasteful number, since it uses less digits than its factorization.

77320871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5145.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 77320871 is about 8793.2287016772. The cubic root of 77320871 is about 426.0222148187.

The spelling of 77320871 in words is "seventy-seven million, three hundred twenty thousand, eight hundred seventy-one".