391090469017 has 2 divisors, whose sum is σ = 391090469018. Its totient is φ = 391090469016.

The previous prime is 391090468973. The next prime is 391090469039. The reversal of 391090469017 is 710964090193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389102735961 + 1987733056 = 623781^2 + 44584^2 .

It is a cyclic number.

It is not a de Polignac number, because 391090469017 - 2¹¹ = 391090466969 is a prime.

It is not a weakly prime, because it can be changed into another prime (391090469057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195545234508 + 195545234509.

It is an arithmetic number, because the mean of its divisors is an integer number (195545234509).

Almost surely, 2^391090469017 is an apocalyptic number.

It is an amenable number.

391090469017 is a deficient number, since it is larger than the sum of its proper divisors (1).

391090469017 is an equidigital number, since it uses as much as digits as its factorization.

391090469017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 49.

The spelling of 391090469017 in words is "three hundred ninety-one billion, ninety million, four hundred sixty-nine thousand, seventeen".