280072769 has 2 divisors, whose sum is σ = 280072770. Its totient is φ = 280072768.

The previous prime is 280072753. The next prime is 280072811. The reversal of 280072769 is 967270082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280060225 + 12544 = 16735^2 + 112^2 .

It is a cyclic number.

It is not a de Polignac number, because 280072769 - 2⁴ = 280072753 is a prime.

It is a super-2 number, since 2×280072769² = 156881511870654722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (280072069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140036384 + 140036385.

It is an arithmetic number, because the mean of its divisors is an integer number (140036385).

Almost surely, 2^280072769 is an apocalyptic number.

It is an amenable number.

280072769 is a deficient number, since it is larger than the sum of its proper divisors (1).

280072769 is an equidigital number, since it uses as much as digits as its factorization.

280072769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 280072769 is about 16735.3747791915. The cubic root of 280072769 is about 654.2699314679.

The spelling of 280072769 in words is "two hundred eighty million, seventy-two thousand, seven hundred sixty-nine".