773440321 has 4 divisors (see below), whose sum is σ = 777366612. Its totient is φ = 769514032.

The previous prime is 773440309. The next prime is 773440333. The reversal of 773440321 is 123044377.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (773440309) and next prime (773440333).

It can be written as a sum of positive squares in 2 ways, for example, as 684345600 + 89094721 = 26160^2 + 9439^2 .

It is a cyclic number.

It is not a de Polignac number, because 773440321 - 2⁹ = 773439809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (773446321) 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 3 ways as a sum of consecutive naturals, for example, 1962850 + ... + 1963243.

It is an arithmetic number, because the mean of its divisors is an integer number (194341653).

Almost surely, 2^773440321 is an apocalyptic number.

It is an amenable number.

773440321 is a deficient number, since it is larger than the sum of its proper divisors (3926291).

773440321 is a wasteful number, since it uses less digits than its factorization.

773440321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926290.

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

The square root of 773440321 is about 27810.7950443708. The cubic root of 773440321 is about 917.9286737570.

Adding to 773440321 its reverse (123044377), we get a palindrome (896484698).

The spelling of 773440321 in words is "seven hundred seventy-three million, four hundred forty thousand, three hundred twenty-one".