213820429 has 2 divisors, whose sum is σ = 213820430. Its totient is φ = 213820428.

The previous prime is 213820417. The next prime is 213820457. The reversal of 213820429 is 924028312.

213820429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213014025 + 806404 = 14595^2 + 898^2 .

It is a cyclic number.

It is not a de Polignac number, because 213820429 - 2²¹ = 211723277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213820429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213820459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106910214 + 106910215.

It is an arithmetic number, because the mean of its divisors is an integer number (106910215).

Almost surely, 2^213820429 is an apocalyptic number.

It is an amenable number.

213820429 is a deficient number, since it is larger than the sum of its proper divisors (1).

213820429 is an equidigital number, since it uses as much as digits as its factorization.

213820429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 213820429 is about 14622.5999398192. The cubic root of 213820429 is about 597.9750523703.

The spelling of 213820429 in words is "two hundred thirteen million, eight hundred twenty thousand, four hundred twenty-nine".