6139997 has 4 divisors (see below), whose sum is σ = 6255900. Its totient is φ = 6024096.

The previous prime is 6139993. The next prime is 6139999. The reversal of 6139997 is 7999316.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4726276 + 1413721 = 2174^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 6139997 - 2² = 6139993 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6139993) 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 3 ways as a sum of consecutive naturals, for example, 57872 + ... + 57977.

It is an arithmetic number, because the mean of its divisors is an integer number (1563975).

Almost surely, 2^6139997 is an apocalyptic number.

It is an amenable number.

6139997 is a deficient number, since it is larger than the sum of its proper divisors (115903).

6139997 is a wasteful number, since it uses less digits than its factorization.

6139997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115902.

The product of its digits is 91854, while the sum is 44.

The square root of 6139997 is about 2477.9017333220. The cubic root of 6139997 is about 183.1144933342.

The spelling of 6139997 in words is "six million, one hundred thirty-nine thousand, nine hundred ninety-seven".