194779753117 has 2 divisors, whose sum is σ = 194779753118. Its totient is φ = 194779753116.

The previous prime is 194779752991. The next prime is 194779753141. The reversal of 194779753117 is 711357977491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160200863001 + 34578890116 = 400251^2 + 185954^2 .

It is a cyclic number.

It is not a de Polignac number, because 194779753117 - 2³¹ = 192632269469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194779763117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97389876558 + 97389876559.

It is an arithmetic number, because the mean of its divisors is an integer number (97389876559).

Almost surely, 2^194779753117 is an apocalyptic number.

It is an amenable number.

194779753117 is a deficient number, since it is larger than the sum of its proper divisors (1).

194779753117 is an equidigital number, since it uses as much as digits as its factorization.

194779753117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11668860, while the sum is 61.

The spelling of 194779753117 in words is "one hundred ninety-four billion, seven hundred seventy-nine million, seven hundred fifty-three thousand, one hundred seventeen".