281392091 has 2 divisors, whose sum is σ = 281392092. Its totient is φ = 281392090.

The previous prime is 281392081. The next prime is 281392093. The reversal of 281392091 is 190293182.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281392091 is a prime.

Together with 281392093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (281392093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140696045 + 140696046.

It is an arithmetic number, because the mean of its divisors is an integer number (140696046).

Almost surely, 2^281392091 is an apocalyptic number.

281392091 is a deficient number, since it is larger than the sum of its proper divisors (1).

281392091 is an equidigital number, since it uses as much as digits as its factorization.

281392091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 281392091 is about 16774.7456314544. The cubic root of 281392091 is about 655.2956659069.

The spelling of 281392091 in words is "two hundred eighty-one million, three hundred ninety-two thousand, ninety-one".