301990993 has 2 divisors, whose sum is σ = 301990994. Its totient is φ = 301990992.

The previous prime is 301990961. The next prime is 301991017. The reversal of 301990993 is 399099103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293505424 + 8485569 = 17132^2 + 2913^2 .

It is a cyclic number.

It is not a de Polignac number, because 301990993 - 2⁵ = 301990961 is a prime.

It is not a weakly prime, because it can be changed into another prime (301990093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150995496 + 150995497.

It is an arithmetic number, because the mean of its divisors is an integer number (150995497).

Almost surely, 2^301990993 is an apocalyptic number.

It is an amenable number.

301990993 is a deficient number, since it is larger than the sum of its proper divisors (1).

301990993 is an equidigital number, since it uses as much as digits as its factorization.

301990993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59049, while the sum is 43.

The square root of 301990993 is about 17377.8880477462. Note that the first 3 decimals coincide. The cubic root of 301990993 is about 670.9106152169.

The spelling of 301990993 in words is "three hundred one million, nine hundred ninety thousand, nine hundred ninety-three".