299493621 has 24 divisors (see below), whose sum is σ = 497278080. Its totient is φ = 170143776.

The previous prime is 299493587. The next prime is 299493647. The reversal of 299493621 is 126394992.

It is a happy number.

It is not a de Polignac number, because 299493621 - 2⁹ = 299493109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (299493521) 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 23 ways as a sum of consecutive naturals, for example, 2841 + ... + 24638.

It is an arithmetic number, because the mean of its divisors is an integer number (20719920).

Almost surely, 2^299493621 is an apocalyptic number.

299493621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

299493621 is a deficient number, since it is larger than the sum of its proper divisors (197784459).

299493621 is a wasteful number, since it uses less digits than its factorization.

299493621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27665 (or 27662 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 299493621 is about 17305.8839993801. The cubic root of 299493621 is about 669.0560859760.

The spelling of 299493621 in words is "two hundred ninety-nine million, four hundred ninety-three thousand, six hundred twenty-one".