301201981 has 2 divisors, whose sum is σ = 301201982. Its totient is φ = 301201980.

The previous prime is 301201969. The next prime is 301202009. The reversal of 301201981 is 189102103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260305956 + 40896025 = 16134^2 + 6395^2 .

It is a cyclic number.

It is not a de Polignac number, because 301201981 - 2⁷ = 301201853 is a prime.

It is a super-2 number, since 2×301201981² = 181445266716648722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (301201931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150600990 + 150600991.

It is an arithmetic number, because the mean of its divisors is an integer number (150600991).

Almost surely, 2^301201981 is an apocalyptic number.

It is an amenable number.

301201981 is a deficient number, since it is larger than the sum of its proper divisors (1).

301201981 is an equidigital number, since it uses as much as digits as its factorization.

301201981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 301201981 is about 17355.1715923525. The cubic root of 301201981 is about 670.3258094604.

The spelling of 301201981 in words is "three hundred one million, two hundred one thousand, nine hundred eighty-one".