299853712921 has 27 divisors (see below), whose sum is σ = 351990503487. Its totient is φ = 254694595680.

The previous prime is 299853712903. The next prime is 299853712931. The reversal of 299853712921 is 129217358992.

It is a happy number.

The square root of 299853712921 is 547589.

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

It can be written as a sum of positive squares in only one way, i.e., 176135499225 + 123718213696 = 419685^2 + 351736^2 .

It is not a de Polignac number, because 299853712921 - 2⁹ = 299853712409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (299853712931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 525137566 + ... + 525138136.

Almost surely, 2^299853712921 is an apocalyptic number.

299853712921 is the 547589-th square number.

299853712921 is the 273795-th centered octagonal number.

It is an amenable number.

299853712921 is a deficient number, since it is larger than the sum of its proper divisors (52136790566).

299853712921 is an frugal number, since it uses more digits than its factorization.

299853712921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430 (or 715 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 58.

The spelling of 299853712921 in words is "two hundred ninety-nine billion, eight hundred fifty-three million, seven hundred twelve thousand, nine hundred twenty-one".