198526487 has 2 divisors, whose sum is σ = 198526488. Its totient is φ = 198526486.

The previous prime is 198526441. The next prime is 198526507. The reversal of 198526487 is 784625891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198526487 - 2¹⁰ = 198525463 is a prime.

It is a super-2 number, since 2×198526487² = 78825532081122338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198526417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99263243 + 99263244.

It is an arithmetic number, because the mean of its divisors is an integer number (99263244).

Almost surely, 2^198526487 is an apocalyptic number.

198526487 is a deficient number, since it is larger than the sum of its proper divisors (1).

198526487 is an equidigital number, since it uses as much as digits as its factorization.

198526487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 50.

The square root of 198526487 is about 14089.9427607070. The cubic root of 198526487 is about 583.3638133371.

The spelling of 198526487 in words is "one hundred ninety-eight million, five hundred twenty-six thousand, four hundred eighty-seven".