391343647546403 has 2 divisors, whose sum is σ = 391343647546404. Its totient is φ = 391343647546402.

The previous prime is 391343647546351. The next prime is 391343647546477. The reversal of 391343647546403 is 304645746343193.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391343647546403 is a prime.

It is not a weakly prime, because it can be changed into another prime (391343647446403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195671823773201 + 195671823773202.

It is an arithmetic number, because the mean of its divisors is an integer number (195671823773202).

Almost surely, 2^{391343647546403} is an apocalyptic number.

391343647546403 is a deficient number, since it is larger than the sum of its proper divisors (1).

391343647546403 is an equidigital number, since it uses as much as digits as its factorization.

391343647546403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235146240, while the sum is 62.

The spelling of 391343647546403 in words is "three hundred ninety-one trillion, three hundred forty-three billion, six hundred forty-seven million, five hundred forty-six thousand, four hundred three".