998945494 has 4 divisors (see below), whose sum is σ = 1498418244. Its totient is φ = 499472746.

The previous prime is 998945491. The next prime is 998945531. The reversal of 998945494 is 494549899.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998945491) 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, 249736372 + ... + 249736375.

It is an arithmetic number, because the mean of its divisors is an integer number (374604561).

Almost surely, 2^998945494 is an apocalyptic number.

998945494 is a deficient number, since it is larger than the sum of its proper divisors (499472750).

998945494 is a wasteful number, since it uses less digits than its factorization.

998945494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499472749.

The product of its digits is 16796160, while the sum is 61.

The square root of 998945494 is about 31606.0990000348. The cubic root of 998945494 is about 999.6483743739.

The spelling of 998945494 in words is "nine hundred ninety-eight million, nine hundred forty-five thousand, four hundred ninety-four".