391090468973 has 2 divisors, whose sum is σ = 391090468974. Its totient is φ = 391090468972.

The previous prime is 391090468927. The next prime is 391090469017. The reversal of 391090468973 is 379864090193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281649919849 + 109440549124 = 530707^2 + 330818^2 .

It is a cyclic number.

It is not a de Polignac number, because 391090468973 - 2³⁸ = 116212562029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391090468073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195545234486 + 195545234487.

It is an arithmetic number, because the mean of its divisors is an integer number (195545234487).

Almost surely, 2^391090468973 is an apocalyptic number.

It is an amenable number.

391090468973 is a deficient number, since it is larger than the sum of its proper divisors (1).

391090468973 is an equidigital number, since it uses as much as digits as its factorization.

391090468973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 391090468973 in words is "three hundred ninety-one billion, ninety million, four hundred sixty-eight thousand, nine hundred seventy-three".