194354533873 has 2 divisors, whose sum is σ = 194354533874. Its totient is φ = 194354533872.

The previous prime is 194354533861. The next prime is 194354533973. The reversal of 194354533873 is 378335453491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194346077409 + 8456464 = 440847^2 + 2908^2 .

It is a cyclic number.

It is not a de Polignac number, because 194354533873 - 2²¹ = 194352436721 is a prime.

It is a super-2 number, since 2×194354533873² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (194354533673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97177266936 + 97177266937.

It is an arithmetic number, because the mean of its divisors is an integer number (97177266937).

Almost surely, 2^194354533873 is an apocalyptic number.

It is an amenable number.

194354533873 is a deficient number, since it is larger than the sum of its proper divisors (1).

194354533873 is an equidigital number, since it uses as much as digits as its factorization.

194354533873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 55.

The spelling of 194354533873 in words is "one hundred ninety-four billion, three hundred fifty-four million, five hundred thirty-three thousand, eight hundred seventy-three".