998888554 has 4 divisors (see below), whose sum is σ = 1498332834. Its totient is φ = 499444276.

The previous prime is 998888531. The next prime is 998888573. The reversal of 998888554 is 455888899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455888899 = 10007 ⋅45557.

It can be written as a sum of positive squares in only one way, i.e., 698386329 + 300502225 = 26427^2 + 17335^2 .

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249722137 + ... + 249722140.

Almost surely, 2^998888554 is an apocalyptic number.

998888554 is a deficient number, since it is larger than the sum of its proper divisors (499444280).

998888554 is a wasteful number, since it uses less digits than its factorization.

998888554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499444279.

The product of its digits is 33177600, while the sum is 64.

The square root of 998888554 is about 31605.1982116866. The cubic root of 998888554 is about 999.6293806583.

The spelling of 998888554 in words is "nine hundred ninety-eight million, eight hundred eighty-eight thousand, five hundred fifty-four".