998654211 has 8 divisors (see below), whose sum is σ = 1479487760. Its totient is φ = 665769456.

The previous prime is 998654207. The next prime is 998654221. The reversal of 998654211 is 112456899.

998654211 is a `hidden beast` number, since 9 + 98 + 6 + 542 + 11 = 666.

It is not a de Polignac number, because 998654211 - 2² = 998654207 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (998654221) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18493570 + ... + 18493623.

It is an arithmetic number, because the mean of its divisors is an integer number (184935970).

Almost surely, 2^998654211 is an apocalyptic number.

998654211 is a deficient number, since it is larger than the sum of its proper divisors (480833549).

998654211 is a wasteful number, since it uses less digits than its factorization.

998654211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36987202 (or 36987196 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 998654211 is about 31601.4906452212. The cubic root of 998654211 is about 999.5512022774.

The spelling of 998654211 in words is "nine hundred ninety-eight million, six hundred fifty-four thousand, two hundred eleven".