284405081 has 2 divisors, whose sum is σ = 284405082. Its totient is φ = 284405080.

The previous prime is 284405071. The next prime is 284405083. The reversal of 284405081 is 180504482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209062681 + 75342400 = 14459^2 + 8680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284405081 is a prime.

It is a super-2 number, since 2×284405081² = 161772500197233122, which contains 22 as substring.

Together with 284405083, 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 (284405083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142202540 + 142202541.

It is an arithmetic number, because the mean of its divisors is an integer number (142202541).

Almost surely, 2^284405081 is an apocalyptic number.

It is an amenable number.

284405081 is a deficient number, since it is larger than the sum of its proper divisors (1).

284405081 is an equidigital number, since it uses as much as digits as its factorization.

284405081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 284405081 is about 16864.3138312829. The cubic root of 284405081 is about 657.6262146921.

The spelling of 284405081 in words is "two hundred eighty-four million, four hundred five thousand, eighty-one".