398969697 has 8 divisors (see below), whose sum is σ = 607953856. Its totient is φ = 227982672.

The previous prime is 398969693. The next prime is 398969749. The reversal of 398969697 is 796969893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 398969697 - 2² = 398969693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398969693) 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 7 ways as a sum of consecutive naturals, for example, 9499258 + ... + 9499299.

It is an arithmetic number, because the mean of its divisors is an integer number (75994232).

Almost surely, 2^398969697 is an apocalyptic number.

It is an amenable number.

398969697 is a deficient number, since it is larger than the sum of its proper divisors (208984159).

398969697 is a wasteful number, since it uses less digits than its factorization.

398969697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18998567.

The product of its digits is 39680928, while the sum is 66.

The square root of 398969697 is about 19974.2258172876. The cubic root of 398969697 is about 736.1731443474.

The spelling of 398969697 in words is "three hundred ninety-eight million, nine hundred sixty-nine thousand, six hundred ninety-seven".