391098 has 8 divisors (see below), whose sum is σ = 782208. Its totient is φ = 130364.

The previous prime is 391073. The next prime is 391103. The reversal of 391098 is 890193.

It is a happy number.

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

391098 is an admirable number.

It is a nialpdrome in base 9.

It is an unprimeable number.

391098 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32586 + ... + 32597.

It is an arithmetic number, because the mean of its divisors is an integer number (97776).

2³⁹¹⁰⁹⁸ is an apocalyptic number.

391098 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

391098 is a wasteful number, since it uses less digits than its factorization.

391098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65188.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 391098 is about 625.3782855201. The cubic root of 391098 is about 73.1299368425.

The spelling of 391098 in words is "three hundred ninety-one thousand, ninety-eight".