6138994 has 4 divisors (see below), whose sum is σ = 9208494. Its totient is φ = 3069496.

The previous prime is 6138991. The next prime is 6139019. The reversal of 6138994 is 4998316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3751969 + 2387025 = 1937^2 + 1545^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6138991) 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 as a sum of consecutive naturals, namely, 1534747 + ... + 1534750.

Almost surely, 2^6138994 is an apocalyptic number.

6138994 is a deficient number, since it is larger than the sum of its proper divisors (3069500).

6138994 is a wasteful number, since it uses less digits than its factorization.

6138994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069499.

The product of its digits is 46656, while the sum is 40.

The square root of 6138994 is about 2477.6993360777. The cubic root of 6138994 is about 183.1045218940.

The spelling of 6138994 in words is "six million, one hundred thirty-eight thousand, nine hundred ninety-four".