6501389 has 2 divisors, whose sum is σ = 6501390. Its totient is φ = 6501388.

The previous prime is 6501379. The next prime is 6501403. The reversal of 6501389 is 9831056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6400900 + 100489 = 2530^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 6501389 - 2²⁰ = 5452813 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6501349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3250694 + 3250695.

It is an arithmetic number, because the mean of its divisors is an integer number (3250695).

Almost surely, 2^6501389 is an apocalyptic number.

It is an amenable number.

6501389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6501389 is an equidigital number, since it uses as much as digits as its factorization.

6501389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 6501389 is about 2549.7821475569. The cubic root of 6501389 is about 186.6388503761.

The spelling of 6501389 in words is "six million, five hundred one thousand, three hundred eighty-nine".