998291603 has 4 divisors (see below), whose sum is σ = 999958800. Its totient is φ = 996624408.

The previous prime is 998291599. The next prime is 998291639. The reversal of 998291603 is 306192899.

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

It is a cyclic number.

It is not a de Polignac number, because 998291603 - 2² = 998291599 is a prime.

It is a super-2 number, since 2×998291603² = 1993172249240619218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998291803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832700 + ... + 833897.

It is an arithmetic number, because the mean of its divisors is an integer number (249989700).

Almost surely, 2^998291603 is an apocalyptic number.

998291603 is a deficient number, since it is larger than the sum of its proper divisors (1667197).

998291603 is a wasteful number, since it uses less digits than its factorization.

998291603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667196.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 998291603 is about 31595.7529266197. The cubic root of 998291603 is about 999.4302097340.

The spelling of 998291603 in words is "nine hundred ninety-eight million, two hundred ninety-one thousand, six hundred three".