998831147 has 2 divisors, whose sum is σ = 998831148. Its totient is φ = 998831146.

The previous prime is 998831111. The next prime is 998831149. The reversal of 998831147 is 741138899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998831147 - 2¹⁶ = 998765611 is a prime.

Together with 998831149, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 998831095 and 998831104.

It is not a weakly prime, because it can be changed into another prime (998831149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499415573 + 499415574.

It is an arithmetic number, because the mean of its divisors is an integer number (499415574).

Almost surely, 2^998831147 is an apocalyptic number.

998831147 is a deficient number, since it is larger than the sum of its proper divisors (1).

998831147 is an equidigital number, since it uses as much as digits as its factorization.

998831147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 998831147 is about 31604.2900094275. The cubic root of 998831147 is about 999.6102304328.

The spelling of 998831147 in words is "nine hundred ninety-eight million, eight hundred thirty-one thousand, one hundred forty-seven".