998291803 has 2 divisors, whose sum is σ = 998291804. Its totient is φ = 998291802.

The previous prime is 998291773. The next prime is 998291807. The reversal of 998291803 is 308192899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998291803 is a prime.

It is a super-3 number, since 3×998291803³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (998291807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499145901 + 499145902.

It is an arithmetic number, because the mean of its divisors is an integer number (499145902).

Almost surely, 2^998291803 is an apocalyptic number.

998291803 is a deficient number, since it is larger than the sum of its proper divisors (1).

998291803 is an equidigital number, since it uses as much as digits as its factorization.

998291803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 998291803 is about 31595.7560916019. The cubic root of 998291803 is about 999.4302764767.

The spelling of 998291803 in words is "nine hundred ninety-eight million, two hundred ninety-one thousand, eight hundred three".