6891601 has 2 divisors, whose sum is σ = 6891602. Its totient is φ = 6891600.

The previous prime is 6891593. The next prime is 6891607. The reversal of 6891601 is 1061986.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6250000 + 641601 = 2500^2 + 801^2 .

It is a cyclic number.

It is not a de Polignac number, because 6891601 - 2³ = 6891593 is a prime.

It is not a weakly prime, because it can be changed into another prime (6891607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3445800 + 3445801.

It is an arithmetic number, because the mean of its divisors is an integer number (3445801).

Almost surely, 2^6891601 is an apocalyptic number.

It is an amenable number.

6891601 is a deficient number, since it is larger than the sum of its proper divisors (1).

6891601 is an equidigital number, since it uses as much as digits as its factorization.

6891601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 6891601 is about 2625.1858981794. The cubic root of 6891601 is about 190.3005492598.

The spelling of 6891601 in words is "six million, eight hundred ninety-one thousand, six hundred one".