299437689681 has 63 divisors (see below), whose sum is σ = 486454408779. Its totient is φ = 184151150352.

The previous prime is 299437689653. The next prime is 299437689689. The reversal of 299437689681 is 186986734992.

The square root of 299437689681 is 547209.

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

299437689681 is a `hidden beast` number, since 2 + 9 + 94 + 376 + 8 + 96 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44295516225 + 255142173456 = 210465^2 + 505116^2 .

It is not a de Polignac number, because 299437689681 - 2¹³ = 299437681489 is a prime.

It is a super-2 number, since 2×299437689681² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (299437689689) 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 62 ways as a sum of consecutive naturals, for example, 192069580 + ... + 192071138.

Almost surely, 2^299437689681 is an apocalyptic number.

299437689681 is the 547209-th square number.

299437689681 is the 273605-th centered octagonal number.

It is an amenable number.

299437689681 is a deficient number, since it is larger than the sum of its proper divisors (187016719098).

299437689681 is an frugal number, since it uses more digits than its factorization.

299437689681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162 (or 1575 counting only the distinct ones).

The product of its digits is 282175488, while the sum is 72.

The spelling of 299437689681 in words is "two hundred ninety-nine billion, four hundred thirty-seven million, six hundred eighty-nine thousand, six hundred eighty-one".