1306681922 has 24 divisors (see below), whose sum is σ = 2455415676. Its totient is φ = 516928608.

The previous prime is 1306681879. The next prime is 1306681933. The reversal of 1306681922 is 2291866031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1301117041 + 5564881 = 36071^2 + 2359^2 .

It is a super-2 number, since 2×1306681922² = 3414835290563228168, which contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 511553 + ... + 514100.

Almost surely, 2^1306681922 is an apocalyptic number.

1306681922 is a deficient number, since it is larger than the sum of its proper divisors (1148733754).

1306681922 is a wasteful number, since it uses less digits than its factorization.

1306681922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025682 (or 1025675 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1306681922 is about 36148.0555770293. The cubic root of 1306681922 is about 1093.2595864355.

The spelling of 1306681922 in words is "one billion, three hundred six million, six hundred eighty-one thousand, nine hundred twenty-two".