998147551 has 2 divisors, whose sum is σ = 998147552. Its totient is φ = 998147550.

The previous prime is 998147543. The next prime is 998147561. The reversal of 998147551 is 155741899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998147551 - 2³ = 998147543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 998147495 and 998147504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998147561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499073775 + 499073776.

It is an arithmetic number, because the mean of its divisors is an integer number (499073776).

Almost surely, 2^998147551 is an apocalyptic number.

998147551 is a deficient number, since it is larger than the sum of its proper divisors (1).

998147551 is an equidigital number, since it uses as much as digits as its factorization.

998147551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 49.

The square root of 998147551 is about 31593.4732341982. The cubic root of 998147551 is about 999.3821353219.

The spelling of 998147551 in words is "nine hundred ninety-eight million, one hundred forty-seven thousand, five hundred fifty-one".