9999406 has 4 divisors (see below), whose sum is σ = 14999112. Its totient is φ = 4999702.

The previous prime is 9999401. The next prime is 9999419. The reversal of 9999406 is 6049999.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499850 + ... + 2499853.

It is an arithmetic number, because the mean of its divisors is an integer number (3749778).

Almost surely, 2^9999406 is an apocalyptic number.

9999406 is a deficient number, since it is larger than the sum of its proper divisors (4999706).

9999406 is a wasteful number, since it uses less digits than its factorization.

9999406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999705.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 9999406 is about 3162.1837391271. The cubic root of 9999406 is about 215.4392031380.

The spelling of 9999406 in words is "nine million, nine hundred ninety-nine thousand, four hundred six".