1998527 has 2 divisors, whose sum is σ = 1998528. Its totient is φ = 1998526.

The previous prime is 1998517. The next prime is 1998533. The reversal of 1998527 is 7258991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1998527 - 2¹⁰ = 1997503 is a prime.

It is a super-2 number, since 2×1998527² = 7988220339458, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1998517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999263 + 999264.

It is an arithmetic number, because the mean of its divisors is an integer number (999264).

2^1998527 is an apocalyptic number.

1998527 is a deficient number, since it is larger than the sum of its proper divisors (1).

1998527 is an equidigital number, since it uses as much as digits as its factorization.

1998527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 41.

The square root of 1998527 is about 1413.6926823040. The cubic root of 1998527 is about 125.9611663310.

The spelling of 1998527 in words is "one million, nine hundred ninety-eight thousand, five hundred twenty-seven".