6403091 has 4 divisors (see below), whose sum is σ = 6435792. Its totient is φ = 6370392.

The previous prime is 6403063. The next prime is 6403127. The reversal of 6403091 is 1903046.

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 6403091 - 2¹⁸ = 6140947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6403021) 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, 16055 + ... + 16448.

It is an arithmetic number, because the mean of its divisors is an integer number (1608948).

Almost surely, 2^6403091 is an apocalyptic number.

6403091 is a deficient number, since it is larger than the sum of its proper divisors (32701).

6403091 is a wasteful number, since it uses less digits than its factorization.

6403091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32700.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 6403091 is about 2530.4329669051. The cubic root of 6403091 is about 185.6934384319.

The spelling of 6403091 in words is "six million, four hundred three thousand, ninety-one".