998337787 has 2 divisors, whose sum is σ = 998337788. Its totient is φ = 998337786.

The previous prime is 998337757. The next prime is 998337797. The reversal of 998337787 is 787733899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998337787 - 2¹⁹ = 997813499 is a prime.

It is not a weakly prime, because it can be changed into another prime (998337727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499168893 + 499168894.

It is an arithmetic number, because the mean of its divisors is an integer number (499168894).

Almost surely, 2^998337787 is an apocalyptic number.

998337787 is a deficient number, since it is larger than the sum of its proper divisors (1).

998337787 is an equidigital number, since it uses as much as digits as its factorization.

998337787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16003008, while the sum is 61.

The square root of 998337787 is about 31596.4837758887. The cubic root of 998337787 is about 999.4456217215.

The spelling of 998337787 in words is "nine hundred ninety-eight million, three hundred thirty-seven thousand, seven hundred eighty-seven".