998154749 has 2 divisors, whose sum is σ = 998154750. Its totient is φ = 998154748.

The previous prime is 998154697. The next prime is 998154767. The reversal of 998154749 is 947451899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 947531524 + 50623225 = 30782^2 + 7115^2 .

It is a cyclic number.

It is not a de Polignac number, because 998154749 - 2²⁸ = 729719293 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 998154694 and 998154703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998154049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499077374 + 499077375.

It is an arithmetic number, because the mean of its divisors is an integer number (499077375).

Almost surely, 2^998154749 is an apocalyptic number.

It is an amenable number.

998154749 is a deficient number, since it is larger than the sum of its proper divisors (1).

998154749 is an equidigital number, since it uses as much as digits as its factorization.

998154749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 56.

The square root of 998154749 is about 31593.5871499265. The cubic root of 998154749 is about 999.3845376171.

The spelling of 998154749 in words is "nine hundred ninety-eight million, one hundred fifty-four thousand, seven hundred forty-nine".