398073569 has 4 divisors (see below), whose sum is σ = 398163120. Its totient is φ = 397984020.

The previous prime is 398073539. The next prime is 398073583. The reversal of 398073569 is 965370893.

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: 965370893 = 953 ⋅1012981.

It is a cyclic number.

It is not a de Polignac number, because 398073569 - 2²⁴ = 381296353 is a prime.

It is a super-3 number, since 3×398073569³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398073539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37739 + ... + 47120.

It is an arithmetic number, because the mean of its divisors is an integer number (99540780).

Almost surely, 2^398073569 is an apocalyptic number.

It is an amenable number.

398073569 is a deficient number, since it is larger than the sum of its proper divisors (89551).

398073569 is an equidigital number, since it uses as much as digits as its factorization.

398073569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89550.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 398073569 is about 19951.7810984383. The cubic root of 398073569 is about 735.6215570027.

The spelling of 398073569 in words is "three hundred ninety-eight million, seventy-three thousand, five hundred sixty-nine".