213717629 has 2 divisors, whose sum is σ = 213717630. Its totient is φ = 213717628.

The previous prime is 213717583. The next prime is 213717667. The reversal of 213717629 is 926717312.

It is an a-pointer prime, because the next prime (213717667) can be obtained adding 213717629 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171662404 + 42055225 = 13102^2 + 6485^2 .

It is a cyclic number.

It is not a de Polignac number, because 213717629 - 2²⁰ = 212669053 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213717592 and 213717601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213717929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106858814 + 106858815.

It is an arithmetic number, because the mean of its divisors is an integer number (106858815).

Almost surely, 2^213717629 is an apocalyptic number.

It is an amenable number.

213717629 is a deficient number, since it is larger than the sum of its proper divisors (1).

213717629 is an equidigital number, since it uses as much as digits as its factorization.

213717629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 213717629 is about 14619.0844104547. The cubic root of 213717629 is about 597.8792060726.

The spelling of 213717629 in words is "two hundred thirteen million, seven hundred seventeen thousand, six hundred twenty-nine".