999913406 has 16 divisors (see below), whose sum is σ = 1513064016. Its totient is φ = 495569856.

The previous prime is 999913381. The next prime is 999913451. The reversal of 999913406 is 604319999.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213320 + ... + 217956.

It is an arithmetic number, because the mean of its divisors is an integer number (94566501).

Almost surely, 2^999913406 is an apocalyptic number.

999913406 is a deficient number, since it is larger than the sum of its proper divisors (513150610).

999913406 is a wasteful number, since it uses less digits than its factorization.

999913406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563.

The product of its (nonzero) digits is 472392, while the sum is 50.

The square root of 999913406 is about 31621.4074006835. The cubic root of 999913406 is about 999.9711345001.

The spelling of 999913406 in words is "nine hundred ninety-nine million, nine hundred thirteen thousand, four hundred six".