280973999 has 2 divisors, whose sum is σ = 280974000. Its totient is φ = 280973998.

The previous prime is 280973981. The next prime is 280974013. The reversal of 280973999 is 999379082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280973999 - 2¹² = 280969903 is a prime.

It is a super-2 number, since 2×280973999² = 157892776228104002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280973939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140486999 + 140487000.

It is an arithmetic number, because the mean of its divisors is an integer number (140487000).

Almost surely, 2^280973999 is an apocalyptic number.

280973999 is a deficient number, since it is larger than the sum of its proper divisors (1).

280973999 is an equidigital number, since it uses as much as digits as its factorization.

280973999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 56.

The square root of 280973999 is about 16762.2790514894. The cubic root of 280973999 is about 654.9709592237.

The spelling of 280973999 in words is "two hundred eighty million, nine hundred seventy-three thousand, nine hundred ninety-nine".