249587785949 has 2 divisors, whose sum is σ = 249587785950. Its totient is φ = 249587785948.

The previous prime is 249587785927. The next prime is 249587785981. The reversal of 249587785949 is 949587785942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239992212100 + 9595573849 = 489890^2 + 97957^2 .

It is a cyclic number.

It is not a de Polignac number, because 249587785949 - 2¹² = 249587781853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249587785949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249587785919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124793892974 + 124793892975.

It is an arithmetic number, because the mean of its divisors is an integer number (124793892975).

Almost surely, 2^249587785949 is an apocalyptic number.

It is an amenable number.

249587785949 is a deficient number, since it is larger than the sum of its proper divisors (1).

249587785949 is an equidigital number, since it uses as much as digits as its factorization.

249587785949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1828915200, while the sum is 77.

The spelling of 249587785949 in words is "two hundred forty-nine billion, five hundred eighty-seven million, seven hundred eighty-five thousand, nine hundred forty-nine".