6138999 has 24 divisors (see below), whose sum is σ = 9464832. Its totient is φ = 3825360.

The previous prime is 6138991. The next prime is 6139019. The reversal of 6138999 is 9998316.

It is not a de Polignac number, because 6138999 - 2³ = 6138991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6138991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9414 + ... + 10044.

It is an arithmetic number, because the mean of its divisors is an integer number (394368).

Almost surely, 2^6138999 is an apocalyptic number.

6138999 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

6138999 is a deficient number, since it is larger than the sum of its proper divisors (3325833).

6138999 is a wasteful number, since it uses less digits than its factorization.

6138999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 704 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 6138999 is about 2477.7003450781. The cubic root of 6138999 is about 183.1045716048.

It can be divided in two parts, 61 and 38999, that added together give a triangular number (39060 = T₂₇₉).

The spelling of 6138999 in words is "six million, one hundred thirty-eight thousand, nine hundred ninety-nine".