281080391 has 2 divisors, whose sum is σ = 281080392. Its totient is φ = 281080390.

The previous prime is 281080369. The next prime is 281080417. The reversal of 281080391 is 193080182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281080391 - 2²² = 276886087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281080321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140540195 + 140540196.

It is an arithmetic number, because the mean of its divisors is an integer number (140540196).

Almost surely, 2^281080391 is an apocalyptic number.

281080391 is a deficient number, since it is larger than the sum of its proper divisors (1).

281080391 is an equidigital number, since it uses as much as digits as its factorization.

281080391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 281080391 is about 16765.4523052616. The cubic root of 281080391 is about 655.0536179715.

The spelling of 281080391 in words is "two hundred eighty-one million, eighty thousand, three hundred ninety-one".