1306606013 has 4 divisors (see below), whose sum is σ = 1306699548. Its totient is φ = 1306512480.

The previous prime is 1306605961. The next prime is 1306606027. The reversal of 1306606013 is 3106066031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3106066031 = 263 ⋅11810137.

It can be written as a sum of positive squares in 2 ways, for example, as 217474009 + 1089132004 = 14747^2 + 33002^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306606013 - 2²⁰ = 1305557437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306606033) 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, 21128 + ... + 55313.

It is an arithmetic number, because the mean of its divisors is an integer number (326674887).

Almost surely, 2^1306606013 is an apocalyptic number.

It is an amenable number.

1306606013 is a deficient number, since it is larger than the sum of its proper divisors (93535).

1306606013 is an equidigital number, since it uses as much as digits as its factorization.

1306606013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93534.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1306606013 is about 36147.0055882918. The cubic root of 1306606013 is about 1093.2384158028.

The spelling of 1306606013 in words is "one billion, three hundred six million, six hundred six thousand, thirteen".