308964213 has 10 divisors (see below), whose sum is σ = 461539254. Its totient is φ = 205976088.

The previous prime is 308964209. The next prime is 308964287. The reversal of 308964213 is 312469803.

308964213 is a `hidden beast` number, since 3 + 0 + 8 + 9 + 642 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 162868644 + 146095569 = 12762^2 + 12087^2 .

It is not a de Polignac number, because 308964213 - 2² = 308964209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308964013) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1907106 + ... + 1907267.

Almost surely, 2^308964213 is an apocalyptic number.

It is an amenable number.

308964213 is a deficient number, since it is larger than the sum of its proper divisors (152575041).

308964213 is an equidigital number, since it uses as much as digits as its factorization.

308964213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814385 (or 3814376 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 308964213 is about 17577.3778761225. The cubic root of 308964213 is about 676.0353296954.

The spelling of 308964213 in words is "three hundred eight million, nine hundred sixty-four thousand, two hundred thirteen".