1306538213 has 8 divisors (see below), whose sum is σ = 1385543232. Its totient is φ = 1227772096.

The previous prime is 1306538197. The next prime is 1306538227. The reversal of 1306538213 is 3128356031.

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

It is not a de Polignac number, because 1306538213 - 2⁴ = 1306538197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1306538213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306538113) 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, 48395 + ... + 70392.

It is an arithmetic number, because the mean of its divisors is an integer number (173192904).

Almost surely, 2^1306538213 is an apocalyptic number.

It is an amenable number.

1306538213 is a deficient number, since it is larger than the sum of its proper divisors (79005019).

1306538213 is a wasteful number, since it uses less digits than its factorization.

1306538213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119451.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1306538213 is about 36146.0677391055. The cubic root of 1306538213 is about 1093.2195060356.

The spelling of 1306538213 in words is "one billion, three hundred six million, five hundred thirty-eight thousand, two hundred thirteen".