999139101 has 8 divisors (see below), whose sum is σ = 1350434880. Its totient is φ = 656968032.

The previous prime is 999139087. The next prime is 999139139. The reversal of 999139101 is 101931999.

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

It is not a de Polignac number, because 999139101 - 2¹¹ = 999137053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999139151) 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, 2280921 + ... + 2281358.

It is an arithmetic number, because the mean of its divisors is an integer number (168804360).

Almost surely, 2^999139101 is an apocalyptic number.

It is an amenable number.

999139101 is a deficient number, since it is larger than the sum of its proper divisors (351295779).

999139101 is a wasteful number, since it uses less digits than its factorization.

999139101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562355.

The product of its (nonzero) digits is 19683, while the sum is 42.

The square root of 999139101 is about 31609.1616624041. The cubic root of 999139101 is about 999.7129512776.

The spelling of 999139101 in words is "nine hundred ninety-nine million, one hundred thirty-nine thousand, one hundred one".