249990193796747 has 2 divisors, whose sum is σ = 249990193796748. Its totient is φ = 249990193796746.

The previous prime is 249990193796741. The next prime is 249990193796773. The reversal of 249990193796747 is 747697391099942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249990193796747 - 2¹⁸ = 249990193534603 is a prime.

It is not a weakly prime, because it can be changed into another prime (249990193796741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124995096898373 + 124995096898374.

It is an arithmetic number, because the mean of its divisors is an integer number (124995096898374).

Almost surely, 2^{249990193796747} is an apocalyptic number.

249990193796747 is a deficient number, since it is larger than the sum of its proper divisors (1).

249990193796747 is an equidigital number, since it uses as much as digits as its factorization.

249990193796747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11666192832, while the sum is 86.

The spelling of 249990193796747 in words is "two hundred forty-nine trillion, nine hundred ninety billion, one hundred ninety-three million, seven hundred ninety-six thousand, seven hundred forty-seven".