3185493191897 has 2 divisors, whose sum is σ = 3185493191898. Its totient is φ = 3185493191896.

The previous prime is 3185493191873. The next prime is 3185493191917. The reversal of 3185493191897 is 7981913945813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2377335343321 + 808157848576 = 1541861^2 + 898976^2 .

It is a cyclic number.

It is not a de Polignac number, because 3185493191897 - 2⁶ = 3185493191833 is a prime.

It is not a weakly prime, because it can be changed into another prime (3185493191197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1592746595948 + 1592746595949.

It is an arithmetic number, because the mean of its divisors is an integer number (1592746595949).

Almost surely, 2^{3185493191897} is an apocalyptic number.

It is an amenable number.

3185493191897 is a deficient number, since it is larger than the sum of its proper divisors (1).

3185493191897 is an equidigital number, since it uses as much as digits as its factorization.

3185493191897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 68.

The spelling of 3185493191897 in words is "three trillion, one hundred eighty-five billion, four hundred ninety-three million, one hundred ninety-one thousand, eight hundred ninety-seven".