198520727 has 2 divisors, whose sum is σ = 198520728. Its totient is φ = 198520726.

The previous prime is 198520717. The next prime is 198520733. The reversal of 198520727 is 727025891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198520727 - 2⁴ = 198520711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198520717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99260363 + 99260364.

It is an arithmetic number, because the mean of its divisors is an integer number (99260364).

Almost surely, 2^198520727 is an apocalyptic number.

198520727 is a deficient number, since it is larger than the sum of its proper divisors (1).

198520727 is an equidigital number, since it uses as much as digits as its factorization.

198520727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 198520727 is about 14089.7383581101. The cubic root of 198520727 is about 583.3581714231.

The spelling of 198520727 in words is "one hundred ninety-eight million, five hundred twenty thousand, seven hundred twenty-seven".