6407139 has 4 divisors (see below), whose sum is σ = 8542856. Its totient is φ = 4271424.

The previous prime is 6407131. The next prime is 6407189. The reversal of 6407139 is 9317046.

It is a happy number.

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

It is not a de Polignac number, because 6407139 - 2³ = 6407131 is a prime.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6407131) 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, 1067854 + ... + 1067859.

It is an arithmetic number, because the mean of its divisors is an integer number (2135714).

Almost surely, 2^6407139 is an apocalyptic number.

6407139 is a deficient number, since it is larger than the sum of its proper divisors (2135717).

6407139 is a wasteful number, since it uses less digits than its factorization.

6407139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135716.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 6407139 is about 2531.2327036446. The cubic root of 6407139 is about 185.7325616559.

The spelling of 6407139 in words is "six million, four hundred seven thousand, one hundred thirty-nine".