6181613 has 2 divisors, whose sum is σ = 6181614. Its totient is φ = 6181612.

The previous prime is 6181601. The next prime is 6181619. The reversal of 6181613 is 3161816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4380649 + 1800964 = 2093^2 + 1342^2 .

It is a cyclic number.

It is not a de Polignac number, because 6181613 - 2¹⁰ = 6180589 is a prime.

It is a Sophie Germain 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 (6181619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3090806 + 3090807.

It is an arithmetic number, because the mean of its divisors is an integer number (3090807).

Almost surely, 2^6181613 is an apocalyptic number.

It is an amenable number.

6181613 is a deficient number, since it is larger than the sum of its proper divisors (1).

6181613 is an equidigital number, since it uses as much as digits as its factorization.

6181613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 6181613 is about 2486.2849796433. The cubic root of 6181613 is about 183.5272698894.

The spelling of 6181613 in words is "six million, one hundred eighty-one thousand, six hundred thirteen".