198472049 has 2 divisors, whose sum is σ = 198472050. Its totient is φ = 198472048.

The previous prime is 198472031. The next prime is 198472063. The reversal of 198472049 is 940274891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196897024 + 1575025 = 14032^2 + 1255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198472049 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_10998944 and since 198472049 and 10998944 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (198472009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99236024 + 99236025.

It is an arithmetic number, because the mean of its divisors is an integer number (99236025).

Almost surely, 2^198472049 is an apocalyptic number.

It is an amenable number.

198472049 is a deficient number, since it is larger than the sum of its proper divisors (1).

198472049 is an equidigital number, since it uses as much as digits as its factorization.

198472049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 198472049 is about 14088.0108248113. The cubic root of 198472049 is about 583.3104870145.

The spelling of 198472049 in words is "one hundred ninety-eight million, four hundred seventy-two thousand, forty-nine".