280689041 has 2 divisors, whose sum is σ = 280689042. Its totient is φ = 280689040.

The previous prime is 280688983. The next prime is 280689043. The reversal of 280689041 is 140986082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233478400 + 47210641 = 15280^2 + 6871^2 .

It is a cyclic number.

It is not a de Polignac number, because 280689041 - 2¹⁰ = 280688017 is a prime.

Together with 280689043, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 280688986 and 280689004.

It is not a weakly prime, because it can be changed into another prime (280689043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140344520 + 140344521.

It is an arithmetic number, because the mean of its divisors is an integer number (140344521).

Almost surely, 2^280689041 is an apocalyptic number.

It is an amenable number.

280689041 is a deficient number, since it is larger than the sum of its proper divisors (1).

280689041 is an equidigital number, since it uses as much as digits as its factorization.

280689041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 280689041 is about 16753.7769174595. The cubic root of 280689041 is about 654.7494650094.

The spelling of 280689041 in words is "two hundred eighty million, six hundred eighty-nine thousand, forty-one".