194314337721 has 45 divisors (see below), whose sum is σ = 337711653279. Its totient is φ = 111020895216.

The previous prime is 194314337683. The next prime is 194314337747. The reversal of 194314337721 is 127733413491.

The square root of 194314337721 is 440811.

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

194314337721 is a `hidden beast` number, since 194 + 3 + 1 + 433 + 7 + 7 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 62083197225 + 132231140496 = 249165^2 + 363636^2 .

It is not a de Polignac number, because 194314337721 - 2⁹ = 194314337209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194314317721) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 27767595 + ... + 27774591.

Almost surely, 2^194314337721 is an apocalyptic number.

194314337721 is the 440811-st square number.

194314337721 is the 220406-th centered octagonal number.

It is an amenable number.

194314337721 is a deficient number, since it is larger than the sum of its proper divisors (143397315558).

194314337721 is an frugal number, since it uses more digits than its factorization.

194314337721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14020 (or 7007 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The spelling of 194314337721 in words is "one hundred ninety-four billion, three hundred fourteen million, three hundred thirty-seven thousand, seven hundred twenty-one".