249078726493 has 2 divisors, whose sum is σ = 249078726494. Its totient is φ = 249078726492.

The previous prime is 249078726469. The next prime is 249078726503. The reversal of 249078726493 is 394627870942.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186379568089 + 62699158404 = 431717^2 + 250398^2 .

It is a cyclic number.

It is not a de Polignac number, because 249078726493 - 2⁵ = 249078726461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249078736493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124539363246 + 124539363247.

It is an arithmetic number, because the mean of its divisors is an integer number (124539363247).

Almost surely, 2^249078726493 is an apocalyptic number.

It is an amenable number.

249078726493 is a deficient number, since it is larger than the sum of its proper divisors (1).

249078726493 is an equidigital number, since it uses as much as digits as its factorization.

249078726493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36578304, while the sum is 61.

The spelling of 249078726493 in words is "two hundred forty-nine billion, seventy-eight million, seven hundred twenty-six thousand, four hundred ninety-three".