99139989 has 8 divisors (see below), whose sum is σ = 142354912. Its totient is φ = 61009200.

The previous prime is 99139979. The next prime is 99139993. The reversal of 99139989 is 98993199.

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

It is not a de Polignac number, because 99139989 - 2⁴ = 99139973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99139919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270987 + ... + 1271064.

It is an arithmetic number, because the mean of its divisors is an integer number (17794364).

Almost surely, 2^99139989 is an apocalyptic number.

It is an amenable number.

99139989 is a deficient number, since it is larger than the sum of its proper divisors (43214923).

99139989 is a wasteful number, since it uses less digits than its factorization.

99139989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2542067.

The product of its digits is 1417176, while the sum is 57.

The square root of 99139989 is about 9956.9065979349. The cubic root of 99139989 is about 462.8244447610.

It can be divided in two parts, 99139 and 989, that added together give a triangular number (100128 = T₄₄₇).

The spelling of 99139989 in words is "ninety-nine million, one hundred thirty-nine thousand, nine hundred eighty-nine".