280659641 has 2 divisors, whose sum is σ = 280659642. Its totient is φ = 280659640.

The previous prime is 280659629. The next prime is 280659721. The reversal of 280659641 is 146956082.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242269225 + 38390416 = 15565^2 + 6196^2 .

It is a cyclic number.

It is not a de Polignac number, because 280659641 - 2¹⁴ = 280643257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280659611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140329820 + 140329821.

It is an arithmetic number, because the mean of its divisors is an integer number (140329821).

Almost surely, 2^280659641 is an apocalyptic number.

It is an amenable number.

280659641 is a deficient number, since it is larger than the sum of its proper divisors (1).

280659641 is an equidigital number, since it uses as much as digits as its factorization.

280659641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 280659641 is about 16752.8994803885. The cubic root of 280659641 is about 654.7266042352.

The spelling of 280659641 in words is "two hundred eighty million, six hundred fifty-nine thousand, six hundred forty-one".