280626133 has 2 divisors, whose sum is σ = 280626134. Its totient is φ = 280626132.

The previous prime is 280626131. The next prime is 280626161. The reversal of 280626133 is 331626082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238609809 + 42016324 = 15447^2 + 6482^2 .

It is a cyclic number.

It is not a de Polignac number, because 280626133 - 2¹ = 280626131 is a prime.

Together with 280626131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 280626095 and 280626104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280626131) 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, 140313066 + 140313067.

It is an arithmetic number, because the mean of its divisors is an integer number (140313067).

Almost surely, 2^280626133 is an apocalyptic number.

It is an amenable number.

280626133 is a deficient number, since it is larger than the sum of its proper divisors (1).

280626133 is an equidigital number, since it uses as much as digits as its factorization.

280626133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 280626133 is about 16751.8993848459. The cubic root of 280626133 is about 654.7005472264.

The spelling of 280626133 in words is "two hundred eighty million, six hundred twenty-six thousand, one hundred thirty-three".