249878833 has 2 divisors, whose sum is σ = 249878834. Its totient is φ = 249878832.

The previous prime is 249878813. The next prime is 249878873. The reversal of 249878833 is 338878942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144672784 + 105206049 = 12028^2 + 10257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249878833 is a prime.

It is not a weakly prime, because it can be changed into another prime (249878813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124939416 + 124939417.

It is an arithmetic number, because the mean of its divisors is an integer number (124939417).

Almost surely, 2^249878833 is an apocalyptic number.

It is an amenable number.

249878833 is a deficient number, since it is larger than the sum of its proper divisors (1).

249878833 is an equidigital number, since it uses as much as digits as its factorization.

249878833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 52.

The square root of 249878833 is about 15807.5561994889. The cubic root of 249878833 is about 629.8587345983.

The spelling of 249878833 in words is "two hundred forty-nine million, eight hundred seventy-eight thousand, eight hundred thirty-three".