998554793 has 2 divisors, whose sum is σ = 998554794. Its totient is φ = 998554792.

The previous prime is 998554769. The next prime is 998554829. The reversal of 998554793 is 397455899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995213209 + 3341584 = 31547^2 + 1828^2 .

It is an emirp because it is prime and its reverse (397455899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998554793 - 2¹² = 998550697 is a prime.

It is a super-2 number, since 2×998554793² = 1994223349246545698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (998554703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499277396 + 499277397.

It is an arithmetic number, because the mean of its divisors is an integer number (499277397).

Almost surely, 2^998554793 is an apocalyptic number.

It is an amenable number.

998554793 is a deficient number, since it is larger than the sum of its proper divisors (1).

998554793 is an equidigital number, since it uses as much as digits as its factorization.

998554793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12247200, while the sum is 59.

The square root of 998554793 is about 31599.9176106521. The cubic root of 998554793 is about 999.5180320776.

The spelling of 998554793 in words is "nine hundred ninety-eight million, five hundred fifty-four thousand, seven hundred ninety-three".