398361169 has 4 divisors (see below), whose sum is σ = 398799360. Its totient is φ = 397922980.

The previous prime is 398361167. The next prime is 398361193. The reversal of 398361169 is 961163893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 961163893 = 163 ⋅5896711.

It is a cyclic number.

It is not a de Polignac number, because 398361169 - 2¹ = 398361167 is a prime.

It is a super-2 number, since 2×398361169² = 317383241934093122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398361167) 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, 217729 + ... + 219550.

It is an arithmetic number, because the mean of its divisors is an integer number (99699840).

Almost surely, 2^398361169 is an apocalyptic number.

It is an amenable number.

398361169 is a deficient number, since it is larger than the sum of its proper divisors (438191).

398361169 is an equidigital number, since it uses as much as digits as its factorization.

398361169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438190.

The product of its digits is 209952, while the sum is 46.

The square root of 398361169 is about 19958.9871737020. The cubic root of 398361169 is about 735.7986715248.

The spelling of 398361169 in words is "three hundred ninety-eight million, three hundred sixty-one thousand, one hundred sixty-nine".