698091 has 8 divisors (see below), whose sum is σ = 950784. Its totient is φ = 455400.

The previous prime is 698083. The next prime is 698111. The reversal of 698091 is 190896.

It is a happy number.

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

It is not a de Polignac number, because 698091 - 2³ = 698083 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

698091 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698091.

It is not an unprimeable number, because it can be changed into a prime (698021) 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, 2335 + ... + 2616.

It is an arithmetic number, because the mean of its divisors is an integer number (118848).

2⁶⁹⁸⁰⁹¹ is an apocalyptic number.

698091 is a deficient number, since it is larger than the sum of its proper divisors (252693).

698091 is a wasteful number, since it uses less digits than its factorization.

698091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 698091 is about 835.5184019517. The cubic root of 698091 is about 88.7096119875.

The spelling of 698091 in words is "six hundred ninety-eight thousand, ninety-one".