1306980861 has 8 divisors (see below), whose sum is σ = 1745288160. Its totient is φ = 869997072.

The previous prime is 1306980839. The next prime is 1306980869. The reversal of 1306980861 is 1680896031.

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

It is not a de Polignac number, because 1306980861 - 2⁷ = 1306980733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306980869) 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, 328570 + ... + 332523.

It is an arithmetic number, because the mean of its divisors is an integer number (218161020).

Almost surely, 2^1306980861 is an apocalyptic number.

It is an amenable number.

1306980861 is a deficient number, since it is larger than the sum of its proper divisors (438307299).

1306980861 is an equidigital number, since it uses as much as digits as its factorization.

1306980861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661755.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1306980861 is about 36152.1902655980. The cubic root of 1306980861 is about 1093.3429510254.

The spelling of 1306980861 in words is "one billion, three hundred six million, nine hundred eighty thousand, eight hundred sixty-one".