396690289 has 2 divisors, whose sum is σ = 396690290. Its totient is φ = 396690288.

The previous prime is 396690247. The next prime is 396690311. The reversal of 396690289 is 982096693.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266342400 + 130347889 = 16320^2 + 11417^2 .

It is a cyclic number.

It is not a de Polignac number, because 396690289 - 2¹⁷ = 396559217 is a prime.

It is not a weakly prime, because it can be changed into another prime (396690089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198345144 + 198345145.

It is an arithmetic number, because the mean of its divisors is an integer number (198345145).

Almost surely, 2^396690289 is an apocalyptic number.

It is an amenable number.

396690289 is a deficient number, since it is larger than the sum of its proper divisors (1).

396690289 is an equidigital number, since it uses as much as digits as its factorization.

396690289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 396690289 is about 19917.0853540371. The cubic root of 396690289 is about 734.7684889507.

The spelling of 396690289 in words is "three hundred ninety-six million, six hundred ninety thousand, two hundred eighty-nine".