195574109 has 2 divisors, whose sum is σ = 195574110. Its totient is φ = 195574108.

The previous prime is 195574091. The next prime is 195574117. The reversal of 195574109 is 901475591.

Together with previous prime (195574091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121992025 + 73582084 = 11045^2 + 8578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195574109 is a prime.

It is a super-2 number, since 2×195574109² = 76498464222287762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195574189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97787054 + 97787055.

It is an arithmetic number, because the mean of its divisors is an integer number (97787055).

Almost surely, 2^195574109 is an apocalyptic number.

It is an amenable number.

195574109 is a deficient number, since it is larger than the sum of its proper divisors (1).

195574109 is an equidigital number, since it uses as much as digits as its factorization.

195574109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 41.

The square root of 195574109 is about 13984.7813354375. The cubic root of 195574109 is about 580.4575353301.

The spelling of 195574109 in words is "one hundred ninety-five million, five hundred seventy-four thousand, one hundred nine".