249914813 has 2 divisors, whose sum is σ = 249914814. Its totient is φ = 249914812.

The previous prime is 249914801. The next prime is 249914851. The reversal of 249914813 is 318419942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221473924 + 28440889 = 14882^2 + 5333^2 .

It is a cyclic number.

It is not a de Polignac number, because 249914813 - 2¹⁰ = 249913789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249914893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124957406 + 124957407.

It is an arithmetic number, because the mean of its divisors is an integer number (124957407).

Almost surely, 2^249914813 is an apocalyptic number.

It is an amenable number.

249914813 is a deficient number, since it is larger than the sum of its proper divisors (1).

249914813 is an equidigital number, since it uses as much as digits as its factorization.

249914813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 249914813 is about 15808.6942218515. The cubic root of 249914813 is about 629.8889642224. Note that the first 3 decimals are identical.

The spelling of 249914813 in words is "two hundred forty-nine million, nine hundred fourteen thousand, eight hundred thirteen".