198198029 has 4 divisors (see below), whose sum is σ = 198639900. Its totient is φ = 197756160.

The previous prime is 198198023. The next prime is 198198031. The reversal of 198198029 is 920891891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 920891891 = 821 ⋅1121671.

It can be written as a sum of positive squares in 2 ways, for example, as 123721129 + 74476900 = 11123^2 + 8630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198198029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198198023) 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, 220262 + ... + 221159.

It is an arithmetic number, because the mean of its divisors is an integer number (49659975).

Almost surely, 2^198198029 is an apocalyptic number.

It is an amenable number.

198198029 is a deficient number, since it is larger than the sum of its proper divisors (441871).

198198029 is an equidigital number, since it uses as much as digits as its factorization.

198198029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441870.

The product of its (nonzero) digits is 93312, while the sum is 47.

The square root of 198198029 is about 14078.2821750383. The cubic root of 198198029 is about 583.0419145929.

The spelling of 198198029 in words is "one hundred ninety-eight million, one hundred ninety-eight thousand, twenty-nine".