318629 has 2 divisors, whose sum is σ = 318630. Its totient is φ = 318628.

The previous prime is 318601. The next prime is 318641. The reversal of 318629 is 926813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302500 + 16129 = 550^2 + 127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318629 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318629.

It is not a weakly prime, because it can be changed into another prime (318679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159314 + 159315.

It is an arithmetic number, because the mean of its divisors is an integer number (159315).

2³¹⁸⁶²⁹ is an apocalyptic number.

It is an amenable number.

318629 is a deficient number, since it is larger than the sum of its proper divisors (1).

318629 is an equidigital number, since it uses as much as digits as its factorization.

318629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 318629 is about 564.4723199591. The cubic root of 318629 is about 68.3012156555.

The spelling of 318629 in words is "three hundred eighteen thousand, six hundred twenty-nine".