281641903 has 2 divisors, whose sum is σ = 281641904. Its totient is φ = 281641902.

The previous prime is 281641901. The next prime is 281641933. The reversal of 281641903 is 309146182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281641903 - 2¹ = 281641901 is a prime.

It is a super-3 number, since 3×281641903³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 281641901, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281641901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140820951 + 140820952.

It is an arithmetic number, because the mean of its divisors is an integer number (140820952).

Almost surely, 2^281641903 is an apocalyptic number.

281641903 is a deficient number, since it is larger than the sum of its proper divisors (1).

281641903 is an equidigital number, since it uses as much as digits as its factorization.

281641903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 281641903 is about 16782.1900537445. The cubic root of 281641903 is about 655.4895262499.

The spelling of 281641903 in words is "two hundred eighty-one million, six hundred forty-one thousand, nine hundred three".