249535859 has 2 divisors, whose sum is σ = 249535860. Its totient is φ = 249535858.

The previous prime is 249535849. The next prime is 249535861. The reversal of 249535859 is 958535942.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249535859 is a prime.

It is a Sophie Germain prime.

Together with 249535861, 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 (249535829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124767929 + 124767930.

It is an arithmetic number, because the mean of its divisors is an integer number (124767930).

Almost surely, 2^249535859 is an apocalyptic number.

249535859 is a deficient number, since it is larger than the sum of its proper divisors (1).

249535859 is an equidigital number, since it uses as much as digits as its factorization.

249535859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944000, while the sum is 50.

The square root of 249535859 is about 15796.7040549603. The cubic root of 249535859 is about 629.5704294246.

The spelling of 249535859 in words is "two hundred forty-nine million, five hundred thirty-five thousand, eight hundred fifty-nine".