396194649209 has 2 divisors, whose sum is σ = 396194649210. Its totient is φ = 396194649208.

The previous prime is 396194649181. The next prime is 396194649211. The reversal of 396194649209 is 902946491693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325014010000 + 71180639209 = 570100^2 + 266797^2 .

It is a cyclic number.

It is not a de Polignac number, because 396194649209 - 2⁸ = 396194648953 is a prime.

Together with 396194649211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (396194640209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198097324604 + 198097324605.

It is an arithmetic number, because the mean of its divisors is an integer number (198097324605).

Almost surely, 2^396194649209 is an apocalyptic number.

It is an amenable number.

396194649209 is a deficient number, since it is larger than the sum of its proper divisors (1).

396194649209 is an equidigital number, since it uses as much as digits as its factorization.

396194649209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22674816, while the sum is 62.

The spelling of 396194649209 in words is "three hundred ninety-six billion, one hundred ninety-four million, six hundred forty-nine thousand, two hundred nine".