999340642 has 12 divisors (see below), whose sum is σ = 1536012198. Its totient is φ = 487343600.

The previous prime is 999340619. The next prime is 999340673. The reversal of 999340642 is 246043999.

999340642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 987153561 + 12187081 = 31419^2 + 3491^2 .

It is a junction number, because it is equal to n+sod(n) for n = 999340592 and 999340601.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 284517 + ... + 288007.

Almost surely, 2^999340642 is an apocalyptic number.

999340642 is a deficient number, since it is larger than the sum of its proper divisors (536671556).

999340642 is an frugal number, since it uses more digits than its factorization.

999340642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025 (or 3534 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 999340642 is about 31612.3495172377. The cubic root of 999340642 is about 999.7801656764.

The spelling of 999340642 in words is "nine hundred ninety-nine million, three hundred forty thousand, six hundred forty-two".