6136621 has 2 divisors, whose sum is σ = 6136622. Its totient is φ = 6136620.

The previous prime is 6136619. The next prime is 6136631. The reversal of 6136621 is 1266316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6100900 + 35721 = 2470^2 + 189^2 .

It is a cyclic number.

It is not a de Polignac number, because 6136621 - 2¹ = 6136619 is a prime.

Together with 6136619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6136631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3068310 + 3068311.

It is an arithmetic number, because the mean of its divisors is an integer number (3068311).

Almost surely, 2^6136621 is an apocalyptic number.

It is an amenable number.

6136621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6136621 is an equidigital number, since it uses as much as digits as its factorization.

6136621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 6136621 is about 2477.2204181300. The cubic root of 6136621 is about 183.0809261155.

The spelling of 6136621 in words is "six million, one hundred thirty-six thousand, six hundred twenty-one".