193012109 has 2 divisors, whose sum is σ = 193012110. Its totient is φ = 193012108.

The previous prime is 193012103. The next prime is 193012117. The reversal of 193012109 is 901210391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192376900 + 635209 = 13870^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 193012109 - 2⁴ = 193012093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193012103) 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, 96506054 + 96506055.

It is an arithmetic number, because the mean of its divisors is an integer number (96506055).

Almost surely, 2^193012109 is an apocalyptic number.

It is an amenable number.

193012109 is a deficient number, since it is larger than the sum of its proper divisors (1).

193012109 is an equidigital number, since it uses as much as digits as its factorization.

193012109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 193012109 is about 13892.8797950605. The cubic root of 193012109 is about 577.9117422503.

The spelling of 193012109 in words is "one hundred ninety-three million, twelve thousand, one hundred nine".