194123711953 has 4 divisors (see below), whose sum is σ = 194126239728. Its totient is φ = 194121184180.

The previous prime is 194123711927. The next prime is 194123711959. The reversal of 194123711953 is 359117321491.

194123711953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 359117321491 = 17 ⋅21124548323.

It is a cyclic number.

It is not a de Polignac number, because 194123711953 - 2²¹ = 194121614801 is a prime.

It is a super-2 number, since 2×194123711953² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194123711959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1144963 + ... + 1303528.

It is an arithmetic number, because the mean of its divisors is an integer number (48531559932).

Almost surely, 2^194123711953 is an apocalyptic number.

It is an amenable number.

194123711953 is a deficient number, since it is larger than the sum of its proper divisors (2527775).

194123711953 is an equidigital number, since it uses as much as digits as its factorization.

194123711953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527774.

The product of its digits is 204120, while the sum is 46.

The spelling of 194123711953 in words is "one hundred ninety-four billion, one hundred twenty-three million, seven hundred eleven thousand, nine hundred fifty-three".