998134477 has 2 divisors, whose sum is σ = 998134478. Its totient is φ = 998134476.

The previous prime is 998134471. The next prime is 998134483. The reversal of 998134477 is 774431899.

It is a balanced prime because it is at equal distance from previous prime (998134471) and next prime (998134483).

It can be written as a sum of positive squares in only one way, i.e., 678654601 + 319479876 = 26051^2 + 17874^2 .

It is an emirp because it is prime and its reverse (774431899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998134477 - 2³ = 998134469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998134471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499067238 + 499067239.

It is an arithmetic number, because the mean of its divisors is an integer number (499067239).

Almost surely, 2^998134477 is an apocalyptic number.

It is an amenable number.

998134477 is a deficient number, since it is larger than the sum of its proper divisors (1).

998134477 is an equidigital number, since it uses as much as digits as its factorization.

998134477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 52.

The square root of 998134477 is about 31593.2663236963. The cubic root of 998134477 is about 999.3777719125.

The spelling of 998134477 in words is "nine hundred ninety-eight million, one hundred thirty-four thousand, four hundred seventy-seven".