1998545467 has 2 divisors, whose sum is σ = 1998545468. Its totient is φ = 1998545466.

The previous prime is 1998545447. The next prime is 1998545503. The reversal of 1998545467 is 7645458991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1998545467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1998545447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999272733 + 999272734.

It is an arithmetic number, because the mean of its divisors is an integer number (999272734).

Almost surely, 2^1998545467 is an apocalyptic number.

1998545467 is a deficient number, since it is larger than the sum of its proper divisors (1).

1998545467 is an equidigital number, since it uses as much as digits as its factorization.

1998545467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 58.

The square root of 1998545467 is about 44705.0944188691. The cubic root of 1998545467 is about 1259.6155430305.

The spelling of 1998545467 in words is "one billion, nine hundred ninety-eight million, five hundred forty-five thousand, four hundred sixty-seven".