306812133 has 12 divisors (see below), whose sum is σ = 466498240. Its totient is φ = 193775976.

The previous prime is 306812131. The next prime is 306812137. The reversal of 306812133 is 331218603.

It is a happy number.

It is not a de Polignac number, because 306812133 - 2¹ = 306812131 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 306812097 and 306812106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306812131) 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 11 ways as a sum of consecutive naturals, for example, 896941 + ... + 897282.

Almost surely, 2^306812133 is an apocalyptic number.

It is an amenable number.

306812133 is a deficient number, since it is larger than the sum of its proper divisors (159686107).

306812133 is a wasteful number, since it uses less digits than its factorization.

306812133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794248 (or 1794245 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 306812133 is about 17516.0535795024. The cubic root of 306812133 is about 674.4620372109.

The spelling of 306812133 in words is "three hundred six million, eight hundred twelve thousand, one hundred thirty-three".