998866945 has 8 divisors (see below), whose sum is σ = 1206685800. Its totient is φ = 793729920.

The previous prime is 998866919. The next prime is 998866961. The reversal of 998866945 is 549668899.

It can be written as a sum of positive squares in 4 ways, for example, as 5419584 + 993447361 = 2328^2 + 31519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 998866945 - 2¹¹ = 998864897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669636 + ... + 671125.

It is an arithmetic number, because the mean of its divisors is an integer number (150835725).

It is a Proth number, since it is equal to 30483 ⋅ 2¹⁵ + 1 and 30483 < 2¹⁵.

Almost surely, 2^998866945 is an apocalyptic number.

It is an amenable number.

998866945 is a deficient number, since it is larger than the sum of its proper divisors (207818855).

998866945 is a wasteful number, since it uses less digits than its factorization.

998866945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340915.

The product of its digits is 33592320, while the sum is 64.

The square root of 998866945 is about 31604.8563515166. The cubic root of 998866945 is about 999.6221722642.

The spelling of 998866945 in words is "nine hundred ninety-eight million, eight hundred sixty-six thousand, nine hundred forty-five".