128949099 has 8 divisors (see below), whose sum is σ = 173601792. Its totient is φ = 85131240.

The previous prime is 128949091. The next prime is 128949103. The reversal of 128949099 is 990949821.

It is a happy number.

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

It is not a de Polignac number, because 128949099 - 2³ = 128949091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128949091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208347 + ... + 208964.

It is an arithmetic number, because the mean of its divisors is an integer number (21700224).

Almost surely, 2^128949099 is an apocalyptic number.

128949099 is a deficient number, since it is larger than the sum of its proper divisors (44652693).

128949099 is a wasteful number, since it uses less digits than its factorization.

128949099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417417.

The product of its (nonzero) digits is 419904, while the sum is 51.

The square root of 128949099 is about 11355.5756789341. The cubic root of 128949099 is about 505.2109682862.

The spelling of 128949099 in words is "one hundred twenty-eight million, nine hundred forty-nine thousand, ninety-nine".