6403291 has 4 divisors (see below), whose sum is σ = 6420832. Its totient is φ = 6385752.

The previous prime is 6403279. The next prime is 6403297. The reversal of 6403291 is 1923046.

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 6403291 - 2⁹ = 6402779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6403297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8211 + ... + 8956.

It is an arithmetic number, because the mean of its divisors is an integer number (1605208).

Almost surely, 2^6403291 is an apocalyptic number.

6403291 is a deficient number, since it is larger than the sum of its proper divisors (17541).

6403291 is a wasteful number, since it uses less digits than its factorization.

6403291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17540.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 6403291 is about 2530.4724855252. The cubic root of 6403291 is about 185.6953717847.

The spelling of 6403291 in words is "six million, four hundred three thousand, two hundred ninety-one".