7721296349 has 8 divisors (see below), whose sum is σ = 8316771960. Its totient is φ = 7126039296.

The previous prime is 7721296337. The next prime is 7721296357. The reversal of 7721296349 is 9436921277.

It can be written as a sum of positive squares in 4 ways, for example, as 1440733849 + 6280562500 = 37957^2 + 79250^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7721296349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7721296297 and 7721296306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7721296309) 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, 22817 + ... + 126345.

It is an arithmetic number, because the mean of its divisors is an integer number (1039596495).

Almost surely, 2^7721296349 is an apocalyptic number.

It is an amenable number.

7721296349 is a deficient number, since it is larger than the sum of its proper divisors (595475611).

7721296349 is a wasteful number, since it uses less digits than its factorization.

7721296349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109279.

The product of its digits is 1143072, while the sum is 50.

The square root of 7721296349 is about 87870.9072958735. The cubic root of 7721296349 is about 1976.4996439208.

The spelling of 7721296349 in words is "seven billion, seven hundred twenty-one million, two hundred ninety-six thousand, three hundred forty-nine".