396221299 has 4 divisors (see below), whose sum is σ = 413448336. Its totient is φ = 378994264.

The previous prime is 396221257. The next prime is 396221303. The reversal of 396221299 is 992122693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 992122693 = 97 ⋅10228069.

It is a cyclic number.

It is not a de Polignac number, because 396221299 - 2²³ = 387832691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396221209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8613484 + ... + 8613529.

It is an arithmetic number, because the mean of its divisors is an integer number (103362084).

Almost surely, 2^396221299 is an apocalyptic number.

396221299 is a deficient number, since it is larger than the sum of its proper divisors (17227037).

396221299 is a wasteful number, since it uses less digits than its factorization.

396221299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17227036.

The product of its digits is 104976, while the sum is 43.

The square root of 396221299 is about 19905.3083121061. The cubic root of 396221299 is about 734.4788129541.

The spelling of 396221299 in words is "three hundred ninety-six million, two hundred twenty-one thousand, two hundred ninety-nine".