391248864049 has 2 divisors, whose sum is σ = 391248864050. Its totient is φ = 391248864048.

The previous prime is 391248864011. The next prime is 391248864107. The reversal of 391248864049 is 940468842193.

It is an a-pointer prime, because the next prime (391248864107) can be obtained adding 391248864049 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337119584400 + 54129279649 = 580620^2 + 232657^2 .

It is a cyclic number.

It is not a de Polignac number, because 391248864049 - 2²⁹ = 390711993137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 391248863984 and 391248864002.

It is not a weakly prime, because it can be changed into another prime (391248864949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195624432024 + 195624432025.

It is an arithmetic number, because the mean of its divisors is an integer number (195624432025).

Almost surely, 2^391248864049 is an apocalyptic number.

It is an amenable number.

391248864049 is a deficient number, since it is larger than the sum of its proper divisors (1).

391248864049 is an equidigital number, since it uses as much as digits as its factorization.

391248864049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11943936, while the sum is 58.

The spelling of 391248864049 in words is "three hundred ninety-one billion, two hundred forty-eight million, eight hundred sixty-four thousand, forty-nine".