391495609201 has 2 divisors, whose sum is σ = 391495609202. Its totient is φ = 391495609200.

The previous prime is 391495609199. The next prime is 391495609229. The reversal of 391495609201 is 102906594193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365202662400 + 26292946801 = 604320^2 + 162151^2 .

It is a cyclic number.

It is not a de Polignac number, because 391495609201 - 2¹ = 391495609199 is a prime.

Together with 391495609199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (391495639201) 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, 195747804600 + 195747804601.

It is an arithmetic number, because the mean of its divisors is an integer number (195747804601).

Almost surely, 2^391495609201 is an apocalyptic number.

It is an amenable number.

391495609201 is a deficient number, since it is larger than the sum of its proper divisors (1).

391495609201 is an equidigital number, since it uses as much as digits as its factorization.

391495609201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 49.

The spelling of 391495609201 in words is "three hundred ninety-one billion, four hundred ninety-five million, six hundred nine thousand, two hundred one".