318213629 has 2 divisors, whose sum is σ = 318213630. Its totient is φ = 318213628.

The previous prime is 318213611. The next prime is 318213677. The reversal of 318213629 is 926312813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165122500 + 153091129 = 12850^2 + 12373^2 .

It is a cyclic number.

It is not a de Polignac number, because 318213629 - 2¹² = 318209533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318213689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159106814 + 159106815.

It is an arithmetic number, because the mean of its divisors is an integer number (159106815).

Almost surely, 2^318213629 is an apocalyptic number.

It is an amenable number.

318213629 is a deficient number, since it is larger than the sum of its proper divisors (1).

318213629 is an equidigital number, since it uses as much as digits as its factorization.

318213629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 318213629 is about 17838.5433542092. The cubic root of 318213629 is about 682.7152314869.

The spelling of 318213629 in words is "three hundred eighteen million, two hundred thirteen thousand, six hundred twenty-nine".