6163991 has 2 divisors, whose sum is σ = 6163992. Its totient is φ = 6163990.

The previous prime is 6163957. The next prime is 6164017. The reversal of 6163991 is 1993616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6163991 - 2¹⁴ = 6147607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6163291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3081995 + 3081996.

It is an arithmetic number, because the mean of its divisors is an integer number (3081996).

Almost surely, 2^6163991 is an apocalyptic number.

6163991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6163991 is an equidigital number, since it uses as much as digits as its factorization.

6163991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 35.

The square root of 6163991 is about 2482.7386088753. The cubic root of 6163991 is about 183.3527094305.

The spelling of 6163991 in words is "six million, one hundred sixty-three thousand, nine hundred ninety-one".