77344321 has 8 divisors (see below), whose sum is σ = 78024384. Its totient is φ = 76667280.

The previous prime is 77344313. The next prime is 77344361. The reversal of 77344321 is 12344377.

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 77344321 - 2³ = 77344313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77344301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111586 + ... + 112276.

It is an arithmetic number, because the mean of its divisors is an integer number (9753048).

Almost surely, 2^77344321 is an apocalyptic number.

It is an amenable number.

77344321 is a deficient number, since it is larger than the sum of its proper divisors (680063).

77344321 is a wasteful number, since it uses less digits than its factorization.

77344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511.

The product of its digits is 14112, while the sum is 31.

The square root of 77344321 is about 8794.5620129714. The cubic root of 77344321 is about 426.0652787031.

Adding to 77344321 its reverse (12344377), we get a palindrome (89688698).

The spelling of 77344321 in words is "seventy-seven million, three hundred forty-four thousand, three hundred twenty-one".