301221993 has 4 divisors (see below), whose sum is σ = 401629328. Its totient is φ = 200814660.

The previous prime is 301221989. The next prime is 301222001. The reversal of 301221993 is 399122103.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 301221993 - 2² = 301221989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 301221993.

It is not an unprimeable number, because it can be changed into a prime (301221983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50203663 + ... + 50203668.

It is an arithmetic number, because the mean of its divisors is an integer number (100407332).

Almost surely, 2^301221993 is an apocalyptic number.

It is an amenable number.

301221993 is a deficient number, since it is larger than the sum of its proper divisors (100407335).

301221993 is a wasteful number, since it uses less digits than its factorization.

301221993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100407334.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 301221993 is about 17355.7481256211. The cubic root of 301221993 is about 670.3406547180.

The spelling of 301221993 in words is "three hundred one million, two hundred twenty-one thousand, nine hundred ninety-three".