998687434 has 4 divisors (see below), whose sum is σ = 1498031154. Its totient is φ = 499343716.

The previous prime is 998687419. The next prime is 998687449. The reversal of 998687434 is 434786899.

998687434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (998687419) and next prime (998687449).

It can be written as a sum of positive squares in only one way, i.e., 499388409 + 499299025 = 22347^2 + 22345^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249671857 + ... + 249671860.

Almost surely, 2^998687434 is an apocalyptic number.

998687434 is a deficient number, since it is larger than the sum of its proper divisors (499343720).

998687434 is a wasteful number, since it uses less digits than its factorization.

998687434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499343719.

The product of its digits is 10450944, while the sum is 58.

The square root of 998687434 is about 31602.0162964327. The cubic root of 998687434 is about 999.5622864348.

The spelling of 998687434 in words is "nine hundred ninety-eight million, six hundred eighty-seven thousand, four hundred thirty-four".