280964653 has 2 divisors, whose sum is σ = 280964654. Its totient is φ = 280964652.

The previous prime is 280964639. The next prime is 280964659. The reversal of 280964653 is 356469082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280964644 + 9 = 16762^2 + 3^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280964653 is a prime.

It is a super-2 number, since 2×280964653² = 157882272470820818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280964659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140482326 + 140482327.

It is an arithmetic number, because the mean of its divisors is an integer number (140482327).

Almost surely, 2^280964653 is an apocalyptic number.

It is an amenable number.

280964653 is a deficient number, since it is larger than the sum of its proper divisors (1).

280964653 is an equidigital number, since it uses as much as digits as its factorization.

280964653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 280964653 is about 16762.0002684644. Note that the first 3 decimals coincide. The cubic root of 280964653 is about 654.9636970731.

The spelling of 280964653 in words is "two hundred eighty million, nine hundred sixty-four thousand, six hundred fifty-three".