249445619 has 2 divisors, whose sum is σ = 249445620. Its totient is φ = 249445618.

The previous prime is 249445597. The next prime is 249445631. The reversal of 249445619 is 916544942.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249445619 is a prime.

It is a super-2 number, since 2×249445619² = 124446233676586322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249445619.

It is not a weakly prime, because it can be changed into another prime (249445019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124722809 + 124722810.

It is an arithmetic number, because the mean of its divisors is an integer number (124722810).

Almost surely, 2^249445619 is an apocalyptic number.

249445619 is a deficient number, since it is larger than the sum of its proper divisors (1).

249445619 is an equidigital number, since it uses as much as digits as its factorization.

249445619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 44.

The square root of 249445619 is about 15793.8475046456. The cubic root of 249445619 is about 629.4945294644.

The spelling of 249445619 in words is "two hundred forty-nine million, four hundred forty-five thousand, six hundred nineteen".