198411923 has 2 divisors, whose sum is σ = 198411924. Its totient is φ = 198411922.

The previous prime is 198411907. The next prime is 198411929. The reversal of 198411923 is 329114891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198411923 - 2⁴ = 198411907 is a prime.

It is not a weakly prime, because it can be changed into another prime (198411929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99205961 + 99205962.

It is an arithmetic number, because the mean of its divisors is an integer number (99205962).

Almost surely, 2^198411923 is an apocalyptic number.

198411923 is a deficient number, since it is larger than the sum of its proper divisors (1).

198411923 is an equidigital number, since it uses as much as digits as its factorization.

198411923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 198411923 is about 14085.8767210281. The cubic root of 198411923 is about 583.2515775127.

The spelling of 198411923 in words is "one hundred ninety-eight million, four hundred eleven thousand, nine hundred twenty-three".