1308853561 has 4 divisors (see below), whose sum is σ = 1313320932. Its totient is φ = 1304386192.

The previous prime is 1308853541. The next prime is 1308853583. The reversal of 1308853561 is 1653588031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1653588031 = 19 ⋅87030949.

It can be written as a sum of positive squares in 2 ways, for example, as 1086097936 + 222755625 = 32956^2 + 14925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1308853561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1308853541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2233246 + ... + 2233831.

It is an arithmetic number, because the mean of its divisors is an integer number (328330233).

Almost surely, 2^1308853561 is an apocalyptic number.

It is an amenable number.

1308853561 is a deficient number, since it is larger than the sum of its proper divisors (4467371).

1308853561 is an equidigital number, since it uses as much as digits as its factorization.

1308853561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4467370.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 1308853561 is about 36178.0812233043. The cubic root of 1308853561 is about 1093.8648985319.

The spelling of 1308853561 in words is "one billion, three hundred eight million, eight hundred fifty-three thousand, five hundred sixty-one".