77347321 has 8 divisors (see below), whose sum is σ = 83494080. Its totient is φ = 71432592.

The previous prime is 77347313. The next prime is 77347339. The reversal of 77347321 is 12374377.

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 77347321 - 2³ = 77347313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77347301) 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, 57315 + ... + 58648.

It is an arithmetic number, because the mean of its divisors is an integer number (10436760).

Almost surely, 2^77347321 is an apocalyptic number.

It is an amenable number.

77347321 is a deficient number, since it is larger than the sum of its proper divisors (6146759).

77347321 is a wasteful number, since it uses less digits than its factorization.

77347321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116015.

The product of its digits is 24696, while the sum is 34.

The square root of 77347321 is about 8794.7325712611. The cubic root of 77347321 is about 426.0707873140.

The spelling of 77347321 in words is "seventy-seven million, three hundred forty-seven thousand, three hundred twenty-one".