998687453 has 2 divisors, whose sum is σ = 998687454. Its totient is φ = 998687452.

The previous prime is 998687449. The next prime is 998687477. The reversal of 998687453 is 354786899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 517016644 + 481670809 = 22738^2 + 21947^2 .

It is a cyclic number.

It is not a de Polignac number, because 998687453 - 2² = 998687449 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 998687392 and 998687401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998686453) 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, 499343726 + 499343727.

It is an arithmetic number, because the mean of its divisors is an integer number (499343727).

Almost surely, 2^998687453 is an apocalyptic number.

It is an amenable number.

998687453 is a deficient number, since it is larger than the sum of its proper divisors (1).

998687453 is an equidigital number, since it uses as much as digits as its factorization.

998687453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 59.

The square root of 998687453 is about 31602.0165970465. The cubic root of 998687453 is about 999.5622927737.

The spelling of 998687453 in words is "nine hundred ninety-eight million, six hundred eighty-seven thousand, four hundred fifty-three".