304825981 has 2 divisors, whose sum is σ = 304825982. Its totient is φ = 304825980.

The previous prime is 304825957. The next prime is 304825991. The reversal of 304825981 is 189528403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178623225 + 126202756 = 13365^2 + 11234^2 .

It is a cyclic number.

It is not a de Polignac number, because 304825981 - 2⁷ = 304825853 is a prime.

It is a super-2 number, since 2×304825981² = 185837757385224722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304825991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152412990 + 152412991.

It is an arithmetic number, because the mean of its divisors is an integer number (152412991).

Almost surely, 2^304825981 is an apocalyptic number.

It is an amenable number.

304825981 is a deficient number, since it is larger than the sum of its proper divisors (1).

304825981 is an equidigital number, since it uses as much as digits as its factorization.

304825981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 304825981 is about 17459.2663362468. The cubic root of 304825981 is about 673.0035060500.

It can be divided in two parts, 30482 and 5981, that added together give a palindrome (36463).

The spelling of 304825981 in words is "three hundred four million, eight hundred twenty-five thousand, nine hundred eighty-one".