280699421 has 2 divisors, whose sum is σ = 280699422. Its totient is φ = 280699420.

The previous prime is 280699417. The next prime is 280699453. The reversal of 280699421 is 124996082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225420196 + 55279225 = 15014^2 + 7435^2 .

It is a cyclic number.

It is not a de Polignac number, because 280699421 - 2² = 280699417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280639421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140349710 + 140349711.

It is an arithmetic number, because the mean of its divisors is an integer number (140349711).

Almost surely, 2^280699421 is an apocalyptic number.

It is an amenable number.

280699421 is a deficient number, since it is larger than the sum of its proper divisors (1).

280699421 is an equidigital number, since it uses as much as digits as its factorization.

280699421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 280699421 is about 16754.0866954901. The cubic root of 280699421 is about 654.7575358811.

The spelling of 280699421 in words is "two hundred eighty million, six hundred ninety-nine thousand, four hundred twenty-one".