999999429 has 32 divisors (see below), whose sum is σ = 1588543488. Its totient is φ = 551544000.

The previous prime is 999999391. The next prime is 999999433. The reversal of 999999429 is 924999999.

It is not a de Polignac number, because 999999429 - 2⁹ = 999998917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999029) 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, 14044 + ... + 46874.

It is an arithmetic number, because the mean of its divisors is an integer number (49641984).

Almost surely, 2^999999429 is an apocalyptic number.

It is an amenable number.

999999429 is a deficient number, since it is larger than the sum of its proper divisors (588544059).

999999429 is a wasteful number, since it uses less digits than its factorization.

999999429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32929.

The product of its digits is 38263752, while the sum is 69.

The square root of 999999429 is about 31622.7675733798. The cubic root of 999999429 is about 999.9998096666. Note that the first 3 decimals are identical.

The spelling of 999999429 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, four hundred twenty-nine".