6377991 has 8 divisors (see below), whose sum is σ = 8553840. Its totient is φ = 4227072.

The previous prime is 6377983. The next prime is 6377993. The reversal of 6377991 is 1997736.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6377991 - 2³ = 6377983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6377993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5626 + ... + 6663.

It is an arithmetic number, because the mean of its divisors is an integer number (1069230).

Almost surely, 2^6377991 is an apocalyptic number.

6377991 is a deficient number, since it is larger than the sum of its proper divisors (2175849).

6377991 is a wasteful number, since it uses less digits than its factorization.

6377991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12465.

The product of its digits is 71442, while the sum is 42.

The square root of 6377991 is about 2525.4684713930. The cubic root of 6377991 is about 185.4504823959.

The spelling of 6377991 in words is "six million, three hundred seventy-seven thousand, nine hundred ninety-one".