198632123 has 2 divisors, whose sum is σ = 198632124. Its totient is φ = 198632122.

The previous prime is 198632087. The next prime is 198632129. The reversal of 198632123 is 321236891.

It is a strong prime.

It is an emirp because it is prime and its reverse (321236891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198632123 is a prime.

It is not a weakly prime, because it can be changed into another prime (198632129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99316061 + 99316062.

It is an arithmetic number, because the mean of its divisors is an integer number (99316062).

Almost surely, 2^198632123 is an apocalyptic number.

198632123 is a deficient number, since it is larger than the sum of its proper divisors (1).

198632123 is an equidigital number, since it uses as much as digits as its factorization.

198632123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 198632123 is about 14093.6908934459. The cubic root of 198632123 is about 583.4672643406.

The spelling of 198632123 in words is "one hundred ninety-eight million, six hundred thirty-two thousand, one hundred twenty-three".