6390791 has 4 divisors (see below), whose sum is σ = 6971784. Its totient is φ = 5809800.

The previous prime is 6390763. The next prime is 6390799. The reversal of 6390791 is 1970936.

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 6390791 - 2¹⁰ = 6389767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6390799) 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, 290480 + ... + 290501.

It is an arithmetic number, because the mean of its divisors is an integer number (1742946).

Almost surely, 2^6390791 is an apocalyptic number.

6390791 is a deficient number, since it is larger than the sum of its proper divisors (580993).

6390791 is a wasteful number, since it uses less digits than its factorization.

6390791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580992.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 6390791 is about 2528.0013844933. The cubic root of 6390791 is about 185.5744597826.

The spelling of 6390791 in words is "six million, three hundred ninety thousand, seven hundred ninety-one".