149798 has 12 divisors (see below), whose sum is σ = 247380. Its totient is φ = 67980.

The previous prime is 149791. The next prime is 149803. The reversal of 149798 is 897941.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149791) by changing a digit.

149798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68 + ... + 551.

It is an arithmetic number, because the mean of its divisors is an integer number (20615).

2¹⁴⁹⁷⁹⁸ is an apocalyptic number.

149798 is a deficient number, since it is larger than the sum of its proper divisors (97582).

149798 is a wasteful number, since it uses less digits than its factorization.

149798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 632 counting only the distinct ones).

The product of its digits is 18144, while the sum is 38.

The square root of 149798 is about 387.0374658867. The cubic root of 149798 is about 53.1090669635.

The spelling of 149798 in words is "one hundred forty-nine thousand, seven hundred ninety-eight".