284371421 has 2 divisors, whose sum is σ = 284371422. Its totient is φ = 284371420.

The previous prime is 284371403. The next prime is 284371457. The reversal of 284371421 is 124173482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153016900 + 131354521 = 12370^2 + 11461^2 .

It is a cyclic number.

It is not a de Polignac number, because 284371421 - 2⁶ = 284371357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284371921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142185710 + 142185711.

It is an arithmetic number, because the mean of its divisors is an integer number (142185711).

Almost surely, 2^284371421 is an apocalyptic number.

It is an amenable number.

284371421 is a deficient number, since it is larger than the sum of its proper divisors (1).

284371421 is an equidigital number, since it uses as much as digits as its factorization.

284371421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 32.

The square root of 284371421 is about 16863.3158364540. The cubic root of 284371421 is about 657.6002698067.

The spelling of 284371421 in words is "two hundred eighty-four million, three hundred seventy-one thousand, four hundred twenty-one".