283878649 has 2 divisors, whose sum is σ = 283878650. Its totient is φ = 283878648.

The previous prime is 283878643. The next prime is 283878667. The reversal of 283878649 is 946878382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161112249 + 122766400 = 12693^2 + 11080^2 .

It is a cyclic number.

It is not a de Polignac number, because 283878649 - 2²³ = 275490041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 283878649.

It is not a weakly prime, because it can be changed into another prime (283878643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141939324 + 141939325.

It is an arithmetic number, because the mean of its divisors is an integer number (141939325).

Almost surely, 2^283878649 is an apocalyptic number.

It is an amenable number.

283878649 is a deficient number, since it is larger than the sum of its proper divisors (1).

283878649 is an equidigital number, since it uses as much as digits as its factorization.

283878649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The square root of 283878649 is about 16848.6987331366. The cubic root of 283878649 is about 657.2202101017.

The spelling of 283878649 in words is "two hundred eighty-three million, eight hundred seventy-eight thousand, six hundred forty-nine".