193887897994937 has 2 divisors, whose sum is σ = 193887897994938. Its totient is φ = 193887897994936.

The previous prime is 193887897994897. The next prime is 193887897994949. The reversal of 193887897994937 is 739499798788391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113860936078096 + 80026961916841 = 10670564^2 + 8945779^2 .

It is a cyclic number.

It is not a de Polignac number, because 193887897994937 - 2⁶ = 193887897994873 is a prime.

It is not a weakly prime, because it can be changed into another prime (193887897294937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96943948997468 + 96943948997469.

It is an arithmetic number, because the mean of its divisors is an integer number (96943948997469).

Almost surely, 2^{193887897994937} is an apocalyptic number.

It is an amenable number.

193887897994937 is a deficient number, since it is larger than the sum of its proper divisors (1).

193887897994937 is an equidigital number, since it uses as much as digits as its factorization.

193887897994937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373318170624, while the sum is 101.

The spelling of 193887897994937 in words is "one hundred ninety-three trillion, eight hundred eighty-seven billion, eight hundred ninety-seven million, nine hundred ninety-four thousand, nine hundred thirty-seven".