1306356989 has 8 divisors (see below), whose sum is σ = 1571557440. Its totient is φ = 1060801056.

The previous prime is 1306356979. The next prime is 1306356991. The reversal of 1306356989 is 9896536031.

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

It is a de Polignac number, because none of the positive numbers 2^k-1306356989 is a prime.

It is a super-2 number, since 2×1306356989² = 3413137165418292242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306356979) 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, 4910984 + ... + 4911249.

It is an arithmetic number, because the mean of its divisors is an integer number (196444680).

Almost surely, 2^1306356989 is an apocalyptic number.

1306356989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1306356989 is a deficient number, since it is larger than the sum of its proper divisors (265200451).

1306356989 is an equidigital number, since it uses as much as digits as its factorization.

1306356989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9822259.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The square root of 1306356989 is about 36143.5608234717. The cubic root of 1306356989 is about 1093.1689585224.

The spelling of 1306356989 in words is "one billion, three hundred six million, three hundred fifty-six thousand, nine hundred eighty-nine".