198629 has 4 divisors (see below), whose sum is σ = 199584. Its totient is φ = 197676.

The previous prime is 198623. The next prime is 198637. The reversal of 198629 is 926891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 198629 - 2⁴ = 198613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198629.

It is not an unprimeable number, because it can be changed into a prime (198623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 630.

It is an arithmetic number, because the mean of its divisors is an integer number (49896).

2¹⁹⁸⁶²⁹ is an apocalyptic number.

It is an amenable number.

198629 is a deficient number, since it is larger than the sum of its proper divisors (955).

198629 is an equidigital number, since it uses as much as digits as its factorization.

198629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954.

The product of its digits is 7776, while the sum is 35.

The square root of 198629 is about 445.6781349808. The cubic root of 198629 is about 58.3464206464.

The spelling of 198629 in words is "one hundred ninety-eight thousand, six hundred twenty-nine".