398789697 has 8 divisors (see below), whose sum is σ = 544085344. Its totient is φ = 259676928.

The previous prime is 398789693. The next prime is 398789707. The reversal of 398789697 is 796987893.

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

It is not a de Polignac number, because 398789697 - 2² = 398789693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398789693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1545568 + ... + 1545825.

It is an arithmetic number, because the mean of its divisors is an integer number (68010668).

Almost surely, 2^398789697 is an apocalyptic number.

It is an amenable number.

398789697 is a deficient number, since it is larger than the sum of its proper divisors (145295647).

398789697 is a wasteful number, since it uses less digits than its factorization.

398789697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091439.

The product of its digits is 41150592, while the sum is 66.

The square root of 398789697 is about 19969.7195022865. The cubic root of 398789697 is about 736.0624165570.

The spelling of 398789697 in words is "three hundred ninety-eight million, seven hundred eighty-nine thousand, six hundred ninety-seven".