280130657 has 2 divisors, whose sum is σ = 280130658. Its totient is φ = 280130656.

The previous prime is 280130621. The next prime is 280130677. The reversal of 280130657 is 756031082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214212496 + 65918161 = 14636^2 + 8119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280130657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280130677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140065328 + 140065329.

It is an arithmetic number, because the mean of its divisors is an integer number (140065329).

Almost surely, 2^280130657 is an apocalyptic number.

It is an amenable number.

280130657 is a deficient number, since it is larger than the sum of its proper divisors (1).

280130657 is an equidigital number, since it uses as much as digits as its factorization.

280130657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 280130657 is about 16737.1041999505. The cubic root of 280130657 is about 654.3150051926.

The spelling of 280130657 in words is "two hundred eighty million, one hundred thirty thousand, six hundred fifty-seven".