6407939 has 4 divisors (see below), whose sum is σ = 6470256. Its totient is φ = 6345624.

The previous prime is 6407923. The next prime is 6407941. The reversal of 6407939 is 9397046.

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

It is not a de Polignac number, because 6407939 - 2⁴ = 6407923 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (6407039) 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, 31004 + ... + 31209.

It is an arithmetic number, because the mean of its divisors is an integer number (1617564).

Almost surely, 2^6407939 is an apocalyptic number.

6407939 is a deficient number, since it is larger than the sum of its proper divisors (62317).

6407939 is a wasteful number, since it uses less digits than its factorization.

6407939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62316.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 6407939 is about 2531.3907244833. The cubic root of 6407939 is about 185.7402915681.

The spelling of 6407939 in words is "six million, four hundred seven thousand, nine hundred thirty-nine".