299812921 has 4 divisors (see below), whose sum is σ = 301335012. Its totient is φ = 298290832.

The previous prime is 299812871. The next prime is 299812949. The reversal of 299812921 is 129218992.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 283450896 + 16362025 = 16836^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 299812921 - 2¹⁵ = 299780153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (299812321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760750 + ... + 761143.

It is an arithmetic number, because the mean of its divisors is an integer number (75333753).

Almost surely, 2^299812921 is an apocalyptic number.

It is an amenable number.

299812921 is a deficient number, since it is larger than the sum of its proper divisors (1522091).

299812921 is a wasteful number, since it uses less digits than its factorization.

299812921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522090.

The product of its digits is 46656, while the sum is 43.

The square root of 299812921 is about 17315.1067279414. The cubic root of 299812921 is about 669.2937690951.

The spelling of 299812921 in words is "two hundred ninety-nine million, eight hundred twelve thousand, nine hundred twenty-one".