284191121 has 2 divisors, whose sum is σ = 284191122. Its totient is φ = 284191120.

The previous prime is 284191109. The next prime is 284191129. The reversal of 284191121 is 121191482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151019521 + 133171600 = 12289^2 + 11540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284191121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (284191129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142095560 + 142095561.

It is an arithmetic number, because the mean of its divisors is an integer number (142095561).

Almost surely, 2^284191121 is an apocalyptic number.

It is an amenable number.

284191121 is a deficient number, since it is larger than the sum of its proper divisors (1).

284191121 is an equidigital number, since it uses as much as digits as its factorization.

284191121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 29.

The square root of 284191121 is about 16857.9690651039. The cubic root of 284191121 is about 657.4612610003.

The spelling of 284191121 in words is "two hundred eighty-four million, one hundred ninety-one thousand, one hundred twenty-one".