77554321 has 8 divisors (see below), whose sum is σ = 87151680. Its totient is φ = 68475792.

The previous prime is 77554307. The next prime is 77554339. The reversal of 77554321 is 12345577.

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 77554321 - 2¹¹ = 77552273 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (77554361) 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, 129391 + ... + 129988.

It is an arithmetic number, because the mean of its divisors is an integer number (10893960).

Almost surely, 2^77554321 is an apocalyptic number.

It is an amenable number.

77554321 is a deficient number, since it is larger than the sum of its proper divisors (9597359).

77554321 is a wasteful number, since it uses less digits than its factorization.

77554321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259415.

The product of its digits is 29400, while the sum is 34.

The square root of 77554321 is about 8806.4931158776. The cubic root of 77554321 is about 426.4505379855.

Adding to 77554321 its reverse (12345577), we get a palindrome (89899898).

The spelling of 77554321 in words is "seventy-seven million, five hundred fifty-four thousand, three hundred twenty-one".