27804075197 has 2 divisors, whose sum is σ = 27804075198. Its totient is φ = 27804075196.

The previous prime is 27804075151. The next prime is 27804075209. The reversal of 27804075197 is 79157040872.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25992210841 + 1811864356 = 161221^2 + 42566^2 .

It is a cyclic number.

It is not a de Polignac number, because 27804075197 - 2¹⁶ = 27804009661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27804075997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13902037598 + 13902037599.

It is an arithmetic number, because the mean of its divisors is an integer number (13902037599).

Almost surely, 2^27804075197 is an apocalyptic number.

It is an amenable number.

27804075197 is a deficient number, since it is larger than the sum of its proper divisors (1).

27804075197 is an equidigital number, since it uses as much as digits as its factorization.

27804075197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 27804075197 in words is "twenty-seven billion, eight hundred four million, seventy-five thousand, one hundred ninety-seven".