1000998945 has 64 divisors (see below), whose sum is σ = 1937952000. Its totient is φ = 488291328.

The previous prime is 1000998941. The next prime is 1000998953. The reversal of 1000998945 is 5498990001.

It is not a de Polignac number, because 1000998945 - 2² = 1000998941 is a prime.

It is a super-2 number, since 2×1000998945² = 2003997775782226050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1000998945.

It is not an unprimeable number, because it can be changed into a prime (1000998941) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 67657 + ... + 81113.

It is an arithmetic number, because the mean of its divisors is an integer number (30280500).

Almost surely, 2^1000998945 is an apocalyptic number.

1000998945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1000998945 is a deficient number, since it is larger than the sum of its proper divisors (936953055).

1000998945 is a wasteful number, since it uses less digits than its factorization.

1000998945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13519 (or 13513 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 1000998945 is about 31638.5673664280. The cubic root of 1000998945 is about 1000.3328708514.

The spelling of 1000998945 in words is "one billion, nine hundred ninety-eight thousand, nine hundred forty-five".