6340139 has 4 divisors (see below), whose sum is σ = 6827856. Its totient is φ = 5852424.

The previous prime is 6340127. The next prime is 6340189. The reversal of 6340139 is 9310436.

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

It is a cyclic number.

It is not a de Polignac number, because 6340139 - 2²⁰ = 5291563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6340109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243839 + ... + 243864.

It is an arithmetic number, because the mean of its divisors is an integer number (1706964).

Almost surely, 2^6340139 is an apocalyptic number.

6340139 is a deficient number, since it is larger than the sum of its proper divisors (487717).

6340139 is a wasteful number, since it uses less digits than its factorization.

6340139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487716.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 6340139 is about 2517.9632642277. The cubic root of 6340139 is about 185.0828847008.

The spelling of 6340139 in words is "six million, three hundred forty thousand, one hundred thirty-nine".