999838634 has 16 divisors (see below), whose sum is σ = 1580282880. Its totient is φ = 473130720.

The previous prime is 999838633. The next prime is 999838639. The reversal of 999838634 is 436838999.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (999838633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26519 + ... + 51989.

It is an arithmetic number, because the mean of its divisors is an integer number (98767680).

Almost surely, 2^999838634 is an apocalyptic number.

999838634 is a deficient number, since it is larger than the sum of its proper divisors (580444246).

999838634 is a wasteful number, since it uses less digits than its factorization.

999838634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26525.

The product of its digits is 10077696, while the sum is 59.

The square root of 999838634 is about 31620.2250782628. The cubic root of 999838634 is about 999.9462084399.

The spelling of 999838634 in words is "nine hundred ninety-nine million, eight hundred thirty-eight thousand, six hundred thirty-four".