99999942 has 16 divisors (see below), whose sum is σ = 228571392. Its totient is φ = 28571400.

The previous prime is 99999941. The next prime is 99999959. The reversal of 99999942 is 24999999.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999941) 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, 1190434 + ... + 1190517.

It is an arithmetic number, because the mean of its divisors is an integer number (14285712).

Almost surely, 2^99999942 is an apocalyptic number.

99999942 is an abundant number, since it is smaller than the sum of its proper divisors (128571450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99999942 is a wasteful number, since it uses less digits than its factorization.

99999942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380963.

The product of its digits is 4251528, while the sum is 60.

The square root of 99999942 is about 9999.9970999996. The cubic root of 99999942 is about 464.1587936239.

The spelling of 99999942 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-two".