6501091 has 2 divisors, whose sum is σ = 6501092. Its totient is φ = 6501090.

The previous prime is 6501073. The next prime is 6501109. The reversal of 6501091 is 1901056.

Together with next prime (6501109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (6501073) and next prime (6501109).

It is a cyclic number.

It is not a de Polignac number, because 6501091 - 2¹⁵ = 6468323 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6501031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3250545 + 3250546.

It is an arithmetic number, because the mean of its divisors is an integer number (3250546).

Almost surely, 2^6501091 is an apocalyptic number.

6501091 is a deficient number, since it is larger than the sum of its proper divisors (1).

6501091 is an equidigital number, since it uses as much as digits as its factorization.

6501091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 6501091 is about 2549.7237105224. The cubic root of 6501091 is about 186.6359987174.

The spelling of 6501091 in words is "six million, five hundred one thousand, ninety-one".