999143294 has 4 divisors (see below), whose sum is σ = 1498714944. Its totient is φ = 499571646.

The previous prime is 999143239. The next prime is 999143297. The reversal of 999143294 is 492341999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 492341999 = 2711 ⋅181609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999143297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249785822 + ... + 249785825.

It is an arithmetic number, because the mean of its divisors is an integer number (374678736).

Almost surely, 2^999143294 is an apocalyptic number.

999143294 is a deficient number, since it is larger than the sum of its proper divisors (499571650).

999143294 is a wasteful number, since it uses less digits than its factorization.

999143294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499571649.

The product of its digits is 629856, while the sum is 50.

The square root of 999143294 is about 31609.2279880417. The cubic root of 999143294 is about 999.7143497450.

The spelling of 999143294 in words is "nine hundred ninety-nine million, one hundred forty-three thousand, two hundred ninety-four".