283378261 has 2 divisors, whose sum is σ = 283378262. Its totient is φ = 283378260.

The previous prime is 283378259. The next prime is 283378267. The reversal of 283378261 is 162873382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271260900 + 12117361 = 16470^2 + 3481^2 .

It is a cyclic number.

It is not a de Polignac number, because 283378261 - 2¹ = 283378259 is a prime.

Together with 283378259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (283378267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141689130 + 141689131.

It is an arithmetic number, because the mean of its divisors is an integer number (141689131).

Almost surely, 2^283378261 is an apocalyptic number.

It is an amenable number.

283378261 is a deficient number, since it is larger than the sum of its proper divisors (1).

283378261 is an equidigital number, since it uses as much as digits as its factorization.

283378261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 283378261 is about 16833.8427282662. The cubic root of 283378261 is about 656.8338260777.

The spelling of 283378261 in words is "two hundred eighty-three million, three hundred seventy-eight thousand, two hundred sixty-one".