306845313 has 4 divisors (see below), whose sum is σ = 409127088. Its totient is φ = 204563540.

The previous prime is 306845309. The next prime is 306845321. The reversal of 306845313 is 313548603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313548603 = 3 ⋅104516201.

It is a cyclic number.

It is not a de Polignac number, because 306845313 - 2² = 306845309 is a prime.

It is a super-2 number, since 2×306845313² = 188308092220135938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (306845113) 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, 51140883 + ... + 51140888.

It is an arithmetic number, because the mean of its divisors is an integer number (102281772).

Almost surely, 2^306845313 is an apocalyptic number.

It is an amenable number.

306845313 is a deficient number, since it is larger than the sum of its proper divisors (102281775).

306845313 is a wasteful number, since it uses less digits than its factorization.

306845313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102281774.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 306845313 is about 17517.0006850488. Note that the first 3 decimals coincide. The cubic root of 306845313 is about 674.4863494217.

The spelling of 306845313 in words is "three hundred six million, eight hundred forty-five thousand, three hundred thirteen".