249289390813 has 2 divisors, whose sum is σ = 249289390814. Its totient is φ = 249289390812.

The previous prime is 249289390751. The next prime is 249289390829. The reversal of 249289390813 is 318093982942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227745609529 + 21543781284 = 477227^2 + 146778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249289390813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249289390913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124644695406 + 124644695407.

It is an arithmetic number, because the mean of its divisors is an integer number (124644695407).

Almost surely, 2^249289390813 is an apocalyptic number.

It is an amenable number.

249289390813 is a deficient number, since it is larger than the sum of its proper divisors (1).

249289390813 is an equidigital number, since it uses as much as digits as its factorization.

249289390813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 249289390813 in words is "two hundred forty-nine billion, two hundred eighty-nine million, three hundred ninety thousand, eight hundred thirteen".