213604429 has 2 divisors, whose sum is σ = 213604430. Its totient is φ = 213604428.

The previous prime is 213604397. The next prime is 213604451. The reversal of 213604429 is 924406312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212372329 + 1232100 = 14573^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 213604429 - 2⁵ = 213604397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213604429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213604499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106802214 + 106802215.

It is an arithmetic number, because the mean of its divisors is an integer number (106802215).

Almost surely, 2^213604429 is an apocalyptic number.

It is an amenable number.

213604429 is a deficient number, since it is larger than the sum of its proper divisors (1).

213604429 is an equidigital number, since it uses as much as digits as its factorization.

213604429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 213604429 is about 14615.2122461496. The cubic root of 213604429 is about 597.7736276991.

The spelling of 213604429 in words is "two hundred thirteen million, six hundred four thousand, four hundred twenty-nine".