1045999999 has 4 divisors (see below), whose sum is σ = 1141090920. Its totient is φ = 950909080.

The previous prime is 1045999973. The next prime is 1046000041. The reversal of 1045999999 is 9999995401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9999995401 = 11 ⋅909090491.

It is not a de Polignac number, because 1045999999 - 2²⁷ = 911782271 is a prime.

It is a super-3 number, since 3×1045999999³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

1045999999 is a modest number, since divided by 99999 gives 10459 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1045999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045999909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47545444 + ... + 47545465.

It is an arithmetic number, because the mean of its divisors is an integer number (285272730).

Almost surely, 2^1045999999 is an apocalyptic number.

1045999999 is a deficient number, since it is larger than the sum of its proper divisors (95090921).

1045999999 is an equidigital number, since it uses as much as digits as its factorization.

1045999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95090920.

The product of its (nonzero) digits is 10628820, while the sum is 64.

The square root of 1045999999 is about 32341.9232421326. The cubic root of 1045999999 is about 1015.1040520376.

It can be divided in two parts, 104599 and 9999, that multiplied together give a palindrome (1045885401).

The spelling of 1045999999 in words is "one billion, forty-five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".