220209629 has 2 divisors, whose sum is σ = 220209630. Its totient is φ = 220209628.

The previous prime is 220209599. The next prime is 220209631. The reversal of 220209629 is 926902022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217562500 + 2647129 = 14750^2 + 1627^2 .

It is a cyclic number.

It is not a de Polignac number, because 220209629 - 2¹² = 220205533 is a prime.

Together with 220209631, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 220209595 and 220209604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220229629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110104814 + 110104815.

It is an arithmetic number, because the mean of its divisors is an integer number (110104815).

Almost surely, 2^220209629 is an apocalyptic number.

It is an amenable number.

220209629 is a deficient number, since it is larger than the sum of its proper divisors (1).

220209629 is an equidigital number, since it uses as much as digits as its factorization.

220209629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 220209629 is about 14839.4618837746. The cubic root of 220209629 is about 603.8727538110.

The spelling of 220209629 in words is "two hundred twenty million, two hundred nine thousand, six hundred twenty-nine".