998749406 has 4 divisors (see below), whose sum is σ = 1498124112. Its totient is φ = 499374702.

The previous prime is 998749397. The next prime is 998749417. The reversal of 998749406 is 604947899.

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

It is a congruent number.

It is an unprimeable number.

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, 249687350 + ... + 249687353.

It is an arithmetic number, because the mean of its divisors is an integer number (374531028).

Almost surely, 2^998749406 is an apocalyptic number.

998749406 is a deficient number, since it is larger than the sum of its proper divisors (499374706).

998749406 is a wasteful number, since it uses less digits than its factorization.

998749406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499374705.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 998749406 is about 31602.9967882794. The cubic root of 998749406 is about 999.5829614363.

The spelling of 998749406 in words is "nine hundred ninety-eight million, seven hundred forty-nine thousand, four hundred six".