7707341221 has 4 divisors (see below), whose sum is σ = 8160714252. Its totient is φ = 7253968192.

The previous prime is 7707341219. The next prime is 7707341227. The reversal of 7707341221 is 1221437077.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6816318721 + 891022500 = 82561^2 + 29850^2 .

It is a cyclic number.

It is not a de Polignac number, because 7707341221 - 2¹ = 7707341219 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 (7707341227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226686490 + ... + 226686523.

It is an arithmetic number, because the mean of its divisors is an integer number (2040178563).

Almost surely, 2^7707341221 is an apocalyptic number.

It is an amenable number.

7707341221 is a deficient number, since it is larger than the sum of its proper divisors (453373031).

7707341221 is a wasteful number, since it uses less digits than its factorization.

7707341221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453373030.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 7707341221 is about 87791.4643971725. The cubic root of 7707341221 is about 1975.3081799493.

Adding to 7707341221 its reverse (1221437077), we get a palindrome (8928778298).

The spelling of 7707341221 in words is "seven billion, seven hundred seven million, three hundred forty-one thousand, two hundred twenty-one".