1306940783 has 16 divisors (see below), whose sum is σ = 1390663680. Its totient is φ = 1224789984.

The previous prime is 1306940779. The next prime is 1306940809. The reversal of 1306940783 is 3870496031.

It is a cyclic number.

It is not a de Polignac number, because 1306940783 - 2² = 1306940779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1306940783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306930783) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 732110 + ... + 733892.

It is an arithmetic number, because the mean of its divisors is an integer number (86916480).

Almost surely, 2^1306940783 is an apocalyptic number.

1306940783 is a deficient number, since it is larger than the sum of its proper divisors (83722897).

1306940783 is a wasteful number, since it uses less digits than its factorization.

1306940783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1306940783 is about 36151.6359657485. The cubic root of 1306940783 is about 1093.3317752824.

The spelling of 1306940783 in words is "one billion, three hundred six million, nine hundred forty thousand, seven hundred eighty-three".