998743351 has 4 divisors (see below), whose sum is σ = 998806600. Its totient is φ = 998680104.

The previous prime is 998743321. The next prime is 998743357. The reversal of 998743351 is 153347899.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 153347899 = 151 ⋅1015549.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998743351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 998743295 and 998743304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998743357) 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 in 3 ways as a sum of consecutive naturals, for example, 14080 + ... + 46858.

It is an arithmetic number, because the mean of its divisors is an integer number (249701650).

Almost surely, 2^998743351 is an apocalyptic number.

998743351 is a deficient number, since it is larger than the sum of its proper divisors (63249).

998743351 is a wasteful number, since it uses less digits than its factorization.

998743351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63248.

The product of its digits is 816480, while the sum is 49.

The square root of 998743351 is about 31602.9009902572. The cubic root of 998743351 is about 999.5809414144.

The spelling of 998743351 in words is "nine hundred ninety-eight million, seven hundred forty-three thousand, three hundred fifty-one".