304699981 has 2 divisors, whose sum is σ = 304699982. Its totient is φ = 304699980.

The previous prime is 304699973. The next prime is 304700003. The reversal of 304699981 is 189996403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159617956 + 145082025 = 12634^2 + 12045^2 .

It is a cyclic number.

It is not a de Polignac number, because 304699981 - 2³ = 304699973 is a prime.

It is a super-2 number, since 2×304699981² = 185684156842800722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304699951) 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 as a sum of consecutive naturals, namely, 152349990 + 152349991.

It is an arithmetic number, because the mean of its divisors is an integer number (152349991).

Almost surely, 2^304699981 is an apocalyptic number.

It is an amenable number.

304699981 is a deficient number, since it is larger than the sum of its proper divisors (1).

304699981 is an equidigital number, since it uses as much as digits as its factorization.

304699981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 304699981 is about 17455.6575642397. The cubic root of 304699981 is about 672.9107644711.

The spelling of 304699981 in words is "three hundred four million, six hundred ninety-nine thousand, nine hundred eighty-one".