6407591 has 2 divisors, whose sum is σ = 6407592. Its totient is φ = 6407590.

The previous prime is 6407573. The next prime is 6407671. The reversal of 6407591 is 1957046.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6407591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6407551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203795 + 3203796.

It is an arithmetic number, because the mean of its divisors is an integer number (3203796).

Almost surely, 2^6407591 is an apocalyptic number.

6407591 is a deficient number, since it is larger than the sum of its proper divisors (1).

6407591 is an equidigital number, since it uses as much as digits as its factorization.

6407591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 6407591 is about 2531.3219866307. The cubic root of 6407591 is about 185.7369291354.

The spelling of 6407591 in words is "six million, four hundred seven thousand, five hundred ninety-one".