7209968905 has 4 divisors (see below), whose sum is σ = 8651962692. Its totient is φ = 5767975120.

The previous prime is 7209968879. The next prime is 7209968911. The reversal of 7209968905 is 5098699027.

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 4752585721 + 2457383184 = 68939^2 + 49572^2 .

It is not a de Polignac number, because 7209968905 - 2⁹ = 7209968393 is a prime.

It is a super-2 number, since 2×7209968905² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720996886 + ... + 720996895.

It is an arithmetic number, because the mean of its divisors is an integer number (2162990673).

Almost surely, 2^7209968905 is an apocalyptic number.

It is an amenable number.

7209968905 is a deficient number, since it is larger than the sum of its proper divisors (1441993787).

7209968905 is a wasteful number, since it uses less digits than its factorization.

7209968905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441993786.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The square root of 7209968905 is about 84911.5357592830. The cubic root of 7209968905 is about 1931.8695500690.

The spelling of 7209968905 in words is "seven billion, two hundred nine million, nine hundred sixty-eight thousand, nine hundred five".