1016999643 has 16 divisors (see below), whose sum is σ = 1557129600. Its totient is φ = 583922880.

The previous prime is 1016999623. The next prime is 1016999663. The reversal of 1016999643 is 3469996101.

It is an interprime number because it is at equal distance from previous prime (1016999623) and next prime (1016999663).

It is not a de Polignac number, because 1016999643 - 2¹⁸ = 1016737499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1016999592 and 1016999601.

It is not an unprimeable number, because it can be changed into a prime (1016999623) 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 15 ways as a sum of consecutive naturals, for example, 810378 + ... + 811631.

It is an arithmetic number, because the mean of its divisors is an integer number (97320600).

Almost surely, 2^1016999643 is an apocalyptic number.

1016999643 is a deficient number, since it is larger than the sum of its proper divisors (540129957).

1016999643 is a wasteful number, since it uses less digits than its factorization.

1016999643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622042.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 1016999643 is about 31890.4318409143. The cubic root of 1016999643 is about 1005.6347377622.

The spelling of 1016999643 in words is "one billion, sixteen million, nine hundred ninety-nine thousand, six hundred forty-three".