249984291749 has 2 divisors, whose sum is σ = 249984291750. Its totient is φ = 249984291748.

The previous prime is 249984291701. The next prime is 249984291787. The reversal of 249984291749 is 947192489942.

249984291749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185166696100 + 64817595649 = 430310^2 + 254593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249984291749 is a prime.

It is a super-2 number, since 2×249984291749² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249984291149) 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, 124992145874 + 124992145875.

It is an arithmetic number, because the mean of its divisors is an integer number (124992145875).

Almost surely, 2^249984291749 is an apocalyptic number.

It is an amenable number.

249984291749 is a deficient number, since it is larger than the sum of its proper divisors (1).

249984291749 is an equidigital number, since it uses as much as digits as its factorization.

249984291749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94058496, while the sum is 68.

The spelling of 249984291749 in words is "two hundred forty-nine billion, nine hundred eighty-four million, two hundred ninety-one thousand, seven hundred forty-nine".