1306195849 has 12 divisors (see below), whose sum is σ = 1498281024. Its totient is φ = 1115492472.

The previous prime is 1306195747. The next prime is 1306195853. The reversal of 1306195849 is 9485916031.

It is not a de Polignac number, because 1306195849 - 2⁷ = 1306195721 is a prime.

It is a super-2 number, since 2×1306195849² = 3412295191889661602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1306195799 and 1306195808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306195249) 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 11 ways as a sum of consecutive naturals, for example, 2109862 + ... + 2110480.

It is an arithmetic number, because the mean of its divisors is an integer number (124856752).

Almost surely, 2^1306195849 is an apocalyptic number.

It is an amenable number.

1306195849 is a deficient number, since it is larger than the sum of its proper divisors (192085175).

1306195849 is an frugal number, since it uses more digits than its factorization.

1306195849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 1306195849 is about 36141.3315886396. The cubic root of 1306195849 is about 1093.1240089691.

The spelling of 1306195849 in words is "one billion, three hundred six million, one hundred ninety-five thousand, eight hundred forty-nine".