998766553 has 2 divisors, whose sum is σ = 998766554. Its totient is φ = 998766552.

The previous prime is 998766499. The next prime is 998766607. The reversal of 998766553 is 355667899.

It is a balanced prime because it is at equal distance from previous prime (998766499) and next prime (998766607).

It can be written as a sum of positive squares in only one way, i.e., 880130889 + 118635664 = 29667^2 + 10892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998766553 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (998766653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499383276 + 499383277.

It is an arithmetic number, because the mean of its divisors is an integer number (499383277).

Almost surely, 2^998766553 is an apocalyptic number.

It is an amenable number.

998766553 is a deficient number, since it is larger than the sum of its proper divisors (1).

998766553 is an equidigital number, since it uses as much as digits as its factorization.

998766553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12247200, while the sum is 58.

The square root of 998766553 is about 31603.2680746786. The cubic root of 998766553 is about 999.5886818406.

The spelling of 998766553 in words is "nine hundred ninety-eight million, seven hundred sixty-six thousand, five hundred fifty-three".