999143803 has 4 divisors (see below), whose sum is σ = 1141878640. Its totient is φ = 856408968.

The previous prime is 999143779. The next prime is 999143807. The reversal of 999143803 is 308341999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 999143803 - 2¹⁷ = 999012731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999143807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71367408 + ... + 71367421.

It is an arithmetic number, because the mean of its divisors is an integer number (285469660).

Almost surely, 2^999143803 is an apocalyptic number.

999143803 is a deficient number, since it is larger than the sum of its proper divisors (142734837).

999143803 is a wasteful number, since it uses less digits than its factorization.

999143803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142734836.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 999143803 is about 31609.2360394869. The cubic root of 999143803 is about 999.7145195086.

The spelling of 999143803 in words is "nine hundred ninety-nine million, one hundred forty-three thousand, eight hundred three".