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BaseRepresentation
bin111100110011110…
…101001100001001
32122002201112222012
4330303311030021
54042134021134
6245122505305
734165504553
oct7463651411
92562645865
101020220169
11483984571
12245805235
13133499897
14996d24d3
155e8776ce
hex3ccf5309

1020220169 has 2 divisors, whose sum is σ = 1020220170. Its totient is φ = 1020220168.

The previous prime is 1020220151. The next prime is 1020220171. The reversal of 1020220169 is 9610220201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 899220169 + 121000000 = 29987^2 + 11000^2 .

It is an emirp because it is prime and its reverse (9610220201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020220169 - 212 = 1020216073 is a prime.

It is a super-2 number, since 2×10202201692 = 2081698386468777122, which contains 22 as substring.

Together with 1020220171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1020220109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510110084 + 510110085.

It is an arithmetic number, because the mean of its divisors is an integer number (510110085).

Almost surely, 21020220169 is an apocalyptic number.

It is an amenable number.

1020220169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020220169 is an equidigital number, since it uses as much as digits as its factorization.

1020220169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1020220169 is about 31940.8855387574. The cubic root of 1020220169 is about 1006.6951315114.

The spelling of 1020220169 in words is "one billion, twenty million, two hundred twenty thousand, one hundred sixty-nine".