280061641 has 2 divisors, whose sum is σ = 280061642. Its totient is φ = 280061640.

The previous prime is 280061629. The next prime is 280061647. The reversal of 280061641 is 146160082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274863241 + 5198400 = 16579^2 + 2280^2 .

It is a cyclic number.

It is not a de Polignac number, because 280061641 - 2⁷ = 280061513 is a prime.

It is a super-2 number, since 2×280061641² = 156869045519225762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280061647) 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, 140030820 + 140030821.

It is an arithmetic number, because the mean of its divisors is an integer number (140030821).

Almost surely, 2^280061641 is an apocalyptic number.

It is an amenable number.

280061641 is a deficient number, since it is larger than the sum of its proper divisors (1).

280061641 is an equidigital number, since it uses as much as digits as its factorization.

280061641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 280061641 is about 16735.0423064897. The cubic root of 280061641 is about 654.2612660863.

The spelling of 280061641 in words is "two hundred eighty million, sixty-one thousand, six hundred forty-one".