280761401 has 2 divisors, whose sum is σ = 280761402. Its totient is φ = 280761400.

The previous prime is 280761367. The next prime is 280761419. The reversal of 280761401 is 104167082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175165225 + 105596176 = 13235^2 + 10276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280761401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280761421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140380700 + 140380701.

It is an arithmetic number, because the mean of its divisors is an integer number (140380701).

Almost surely, 2^280761401 is an apocalyptic number.

It is an amenable number.

280761401 is a deficient number, since it is larger than the sum of its proper divisors (1).

280761401 is an equidigital number, since it uses as much as digits as its factorization.

280761401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 280761401 is about 16755.9362913566. The cubic root of 280761401 is about 654.8057237082.

The spelling of 280761401 in words is "two hundred eighty million, seven hundred sixty-one thousand, four hundred one".