280034681 has 2 divisors, whose sum is σ = 280034682. Its totient is φ = 280034680.

The previous prime is 280034641. The next prime is 280034723. The reversal of 280034681 is 186430082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258727225 + 21307456 = 16085^2 + 4616^2 .

It is a cyclic number.

It is not a de Polignac number, because 280034681 - 2²² = 275840377 is a prime.

It is a super-2 number, since 2×280034681² = 156838845125543522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (280034621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140017340 + 140017341.

It is an arithmetic number, because the mean of its divisors is an integer number (140017341).

Almost surely, 2^280034681 is an apocalyptic number.

It is an amenable number.

280034681 is a deficient number, since it is larger than the sum of its proper divisors (1).

280034681 is an equidigital number, since it uses as much as digits as its factorization.

280034681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 280034681 is about 16734.2367916795. The cubic root of 280034681 is about 654.2402713633.

The spelling of 280034681 in words is "two hundred eighty million, thirty-four thousand, six hundred eighty-one".