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1220023169 is a prime number
BaseRepresentation
bin100100010111000…
…0001001110000001
310011000200121011022
41020232001032001
54444311220134
6321021155225
742143011601
oct11056011601
93130617138
101220023169
11576742512
122a06bbb15
131659b5301
14b8062c01
157219352e
hex48b81381

1220023169 has 2 divisors, whose sum is σ = 1220023170. Its totient is φ = 1220023168.

The previous prime is 1220023141. The next prime is 1220023177. The reversal of 1220023169 is 9613200221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1189905025 + 30118144 = 34495^2 + 5488^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220023169 - 28 = 1220022913 is a prime.

It is a super-2 number, since 2×12200231692 = 2976913065793605122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220023369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610011584 + 610011585.

It is an arithmetic number, because the mean of its divisors is an integer number (610011585).

Almost surely, 21220023169 is an apocalyptic number.

It is an amenable number.

1220023169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220023169 is an equidigital number, since it uses as much as digits as its factorization.

1220023169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1220023169 is about 34928.8300548415. The cubic root of 1220023169 is about 1068.5364942496.

The spelling of 1220023169 in words is "one billion, two hundred twenty million, twenty-three thousand, one hundred sixty-nine".