281420004689 has 2 divisors, whose sum is σ = 281420004690. Its totient is φ = 281420004688.

The previous prime is 281420004683. The next prime is 281420004721. The reversal of 281420004689 is 986400024182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209054700625 + 72365304064 = 457225^2 + 269008^2 .

It is a cyclic number.

It is not a de Polignac number, because 281420004689 - 2⁸ = 281420004433 is a prime.

It is not a weakly prime, because it can be changed into another prime (281420004683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140710002344 + 140710002345.

It is an arithmetic number, because the mean of its divisors is an integer number (140710002345).

Almost surely, 2^281420004689 is an apocalyptic number.

It is an amenable number.

281420004689 is a deficient number, since it is larger than the sum of its proper divisors (1).

281420004689 is an equidigital number, since it uses as much as digits as its factorization.

281420004689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 281420004689 in words is "two hundred eighty-one billion, four hundred twenty million, four thousand, six hundred eighty-nine".