6416491 has 2 divisors, whose sum is σ = 6416492. Its totient is φ = 6416490.

The previous prime is 6416489. The next prime is 6416507. The reversal of 6416491 is 1946146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6416491 - 2¹ = 6416489 is a prime.

Together with 6416489, it forms a pair of twin primes.

It is a Chen prime.

6416491 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6426491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3208245 + 3208246.

It is an arithmetic number, because the mean of its divisors is an integer number (3208246).

Almost surely, 2^6416491 is an apocalyptic number.

6416491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6416491 is an equidigital number, since it uses as much as digits as its factorization.

6416491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 6416491 is about 2533.0793513035. The cubic root of 6416491 is about 185.8228841589.

The spelling of 6416491 in words is "six million, four hundred sixteen thousand, four hundred ninety-one".