591898 has 4 divisors (see below), whose sum is σ = 887850. Its totient is φ = 295948.

The previous prime is 591893. The next prime is 591901. The reversal of 591898 is 898195.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 522729 + 69169 = 723^2 + 263^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 591898.

It is not an unprimeable number, because it can be changed into a prime (591893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 147973 + ... + 147976.

2⁵⁹¹⁸⁹⁸ is an apocalyptic number.

591898 is a deficient number, since it is larger than the sum of its proper divisors (295952).

591898 is a wasteful number, since it uses less digits than its factorization.

591898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295951.

The product of its digits is 25920, while the sum is 40.

The square root of 591898 is about 769.3490755177. The cubic root of 591898 is about 83.9619063857.

The spelling of 591898 in words is "five hundred ninety-one thousand, eight hundred ninety-eight".