20230109 has 2 divisors, whose sum is σ = 20230110. Its totient is φ = 20230108.

The previous prime is 20230103. The next prime is 20230121. The reversal of 20230109 is 90103202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14212900 + 6017209 = 3770^2 + 2453^2 .

It is a cyclic number.

It is not a de Polignac number, because 20230109 - 2²⁴ = 3452893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20230103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115054 + 10115055.

It is an arithmetic number, because the mean of its divisors is an integer number (10115055).

Almost surely, 2^20230109 is an apocalyptic number.

It is an amenable number.

20230109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20230109 is an equidigital number, since it uses as much as digits as its factorization.

20230109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 20230109 is about 4497.7893458898. The cubic root of 20230109 is about 272.4788143898.

The spelling of 20230109 in words is "twenty million, two hundred thirty thousand, one hundred nine".