998634541 has 2 divisors, whose sum is σ = 998634542. Its totient is φ = 998634540.

The previous prime is 998634473. The next prime is 998634569. The reversal of 998634541 is 145436899.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 914820516 + 83814025 = 30246^2 + 9155^2 .

It is a cyclic number.

It is not a de Polignac number, because 998634541 - 2¹¹ = 998632493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998634041) 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, 499317270 + 499317271.

It is an arithmetic number, because the mean of its divisors is an integer number (499317271).

Almost surely, 2^998634541 is an apocalyptic number.

It is an amenable number.

998634541 is a deficient number, since it is larger than the sum of its proper divisors (1).

998634541 is an equidigital number, since it uses as much as digits as its factorization.

998634541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 998634541 is about 31601.1794241924. The cubic root of 998634541 is about 999.5446396785.

The spelling of 998634541 in words is "nine hundred ninety-eight million, six hundred thirty-four thousand, five hundred forty-one".