281140939 has 2 divisors, whose sum is σ = 281140940. Its totient is φ = 281140938.

The previous prime is 281140921. The next prime is 281140961. The reversal of 281140939 is 939041182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281140939 - 2¹⁵ = 281108171 is a prime.

It is a Chen prime.

It is equal to p_15284773 and since 281140939 and 15284773 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 281140898 and 281140907.

It is not a weakly prime, because it can be changed into another prime (281140919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140570469 + 140570470.

It is an arithmetic number, because the mean of its divisors is an integer number (140570470).

Almost surely, 2^281140939 is an apocalyptic number.

281140939 is a deficient number, since it is larger than the sum of its proper divisors (1).

281140939 is an equidigital number, since it uses as much as digits as its factorization.

281140939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 281140939 is about 16767.2579451740. The cubic root of 281140939 is about 655.1006499953.

The spelling of 281140939 in words is "two hundred eighty-one million, one hundred forty thousand, nine hundred thirty-nine".