194991035374787 has 2 divisors, whose sum is σ = 194991035374788. Its totient is φ = 194991035374786.

The previous prime is 194991035374757. The next prime is 194991035374813. The reversal of 194991035374787 is 787473530199491.

It is a strong prime.

It is an emirp because it is prime and its reverse (787473530199491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194991035374787 - 2¹⁴ = 194991035358403 is a prime.

It is not a weakly prime, because it can be changed into another prime (194991035374757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97495517687393 + 97495517687394.

It is an arithmetic number, because the mean of its divisors is an integer number (97495517687394).

Almost surely, 2^{194991035374787} is an apocalyptic number.

194991035374787 is a deficient number, since it is larger than the sum of its proper divisors (1).

194991035374787 is an equidigital number, since it uses as much as digits as its factorization.

194991035374787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440270720, while the sum is 77.

The spelling of 194991035374787 in words is "one hundred ninety-four trillion, nine hundred ninety-one billion, thirty-five million, three hundred seventy-four thousand, seven hundred eighty-seven".