194853681 has 63 divisors (see below), whose sum is σ = 328097833. Its totient is φ = 115580520.

The previous prime is 194853679. The next prime is 194853713. The reversal of 194853681 is 186358491.

The square root of 194853681 is 13959.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 194853681 - 2¹ = 194853679 is a prime.

It is a super-2 number, since 2×194853681² = 75935913998499522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194853641) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 4145800 + ... + 4145846.

Almost surely, 2^194853681 is an apocalyptic number.

194853681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

194853681 is the 13959-th square number.

194853681 is the 6980-th centered octagonal number.

It is an amenable number.

194853681 is a deficient number, since it is larger than the sum of its proper divisors (133244152).

194853681 is an frugal number, since it uses more digits than its factorization.

194853681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 61 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The cubic root of 194853681 is about 579.7439228254.

The spelling of 194853681 in words is "one hundred ninety-four million, eight hundred fifty-three thousand, six hundred eighty-one".