1306356449 has 4 divisors (see below), whose sum is σ = 1383200964. Its totient is φ = 1229511936.

The previous prime is 1306356431. The next prime is 1306356451. The reversal of 1306356449 is 9446536031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9446536031 = 10193 ⋅926767.

It can be written as a sum of positive squares in 2 ways, for example, as 1023040225 + 283316224 = 31985^2 + 16832^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306356449 - 2²⁸ = 1037920993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306356409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38422232 + ... + 38422265.

It is an arithmetic number, because the mean of its divisors is an integer number (345800241).

Almost surely, 2^1306356449 is an apocalyptic number.

It is an amenable number.

1306356449 is a deficient number, since it is larger than the sum of its proper divisors (76844515).

1306356449 is an equidigital number, since it uses as much as digits as its factorization.

1306356449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76844514.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 1306356449 is about 36143.5533532607. The cubic root of 1306356449 is about 1093.1688078971.

The spelling of 1306356449 in words is "one billion, three hundred six million, three hundred fifty-six thousand, four hundred forty-nine".