280767493 has 2 divisors, whose sum is σ = 280767494. Its totient is φ = 280767492.

The previous prime is 280767469. The next prime is 280767497. The reversal of 280767493 is 394767082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194686209 + 86081284 = 13953^2 + 9278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280767493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280767497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140383746 + 140383747.

It is an arithmetic number, because the mean of its divisors is an integer number (140383747).

Almost surely, 2^280767493 is an apocalyptic number.

It is an amenable number.

280767493 is a deficient number, since it is larger than the sum of its proper divisors (1).

280767493 is an equidigital number, since it uses as much as digits as its factorization.

280767493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 280767493 is about 16756.1180766907. The cubic root of 280767493 is about 654.8104596959.

The spelling of 280767493 in words is "two hundred eighty million, seven hundred sixty-seven thousand, four hundred ninety-three".