198806039 has 2 divisors, whose sum is σ = 198806040. Its totient is φ = 198806038.

The previous prime is 198806033. The next prime is 198806051. The reversal of 198806039 is 930608891.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198806039 is a prime.

It is a super-2 number, since 2×198806039² = 79047682285739042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198806033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99403019 + 99403020.

It is an arithmetic number, because the mean of its divisors is an integer number (99403020).

Almost surely, 2^198806039 is an apocalyptic number.

198806039 is a deficient number, since it is larger than the sum of its proper divisors (1).

198806039 is an equidigital number, since it uses as much as digits as its factorization.

198806039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 198806039 is about 14099.8595383075. The cubic root of 198806039 is about 583.6375031548.

The spelling of 198806039 in words is "one hundred ninety-eight million, eight hundred six thousand, thirty-nine".