99429778 has 8 divisors (see below), whose sum is σ = 170451072. Its totient is φ = 42612756.

The previous prime is 99429773. The next prime is 99429823. The reversal of 99429778 is 87792499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (99429773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3551050 + ... + 3551077.

It is an arithmetic number, because the mean of its divisors is an integer number (21306384).

Almost surely, 2^99429778 is an apocalyptic number.

99429778 is a deficient number, since it is larger than the sum of its proper divisors (71021294).

99429778 is a wasteful number, since it uses less digits than its factorization.

99429778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7102136.

The product of its digits is 2286144, while the sum is 55.

The square root of 99429778 is about 9971.4481395633. The cubic root of 99429778 is about 463.2749557537.

The spelling of 99429778 in words is "ninety-nine million, four hundred twenty-nine thousand, seven hundred seventy-eight".