249969481393 has 2 divisors, whose sum is σ = 249969481394. Its totient is φ = 249969481392.

The previous prime is 249969481387. The next prime is 249969481403. The reversal of 249969481393 is 393184969942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242666582544 + 7302898849 = 492612^2 + 85457^2 .

It is a cyclic number.

It is not a de Polignac number, because 249969481393 - 2¹⁷ = 249969350321 is a prime.

It is not a weakly prime, because it can be changed into another prime (249969481343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124984740696 + 124984740697.

It is an arithmetic number, because the mean of its divisors is an integer number (124984740697).

Almost surely, 2^249969481393 is an apocalyptic number.

It is an amenable number.

249969481393 is a deficient number, since it is larger than the sum of its proper divisors (1).

249969481393 is an equidigital number, since it uses as much as digits as its factorization.

249969481393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90699264, while the sum is 67.

The spelling of 249969481393 in words is "two hundred forty-nine billion, nine hundred sixty-nine million, four hundred eighty-one thousand, three hundred ninety-three".