999894213 has 32 divisors (see below), whose sum is σ = 1520398080. Its totient is φ = 657359712.

The previous prime is 999894211. The next prime is 999894227. The reversal of 999894213 is 312498999.

It is not a de Polignac number, because 999894213 - 2¹ = 999894211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999894213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999894211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156520 + ... + 162782.

It is an arithmetic number, because the mean of its divisors is an integer number (47512440).

Almost surely, 2^999894213 is an apocalyptic number.

It is an amenable number.

999894213 is a deficient number, since it is larger than the sum of its proper divisors (520503867).

999894213 is an frugal number, since it uses more digits than its factorization.

999894213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6357 (or 6339 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 999894213 is about 31621.1039181114. The cubic root of 999894213 is about 999.9647364232.

The spelling of 999894213 in words is "nine hundred ninety-nine million, eight hundred ninety-four thousand, two hundred thirteen".