6144991 has 2 divisors, whose sum is σ = 6144992. Its totient is φ = 6144990.

The previous prime is 6144989. The next prime is 6145019. The reversal of 6144991 is 1994416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6144991 - 2¹ = 6144989 is a prime.

Together with 6144989, it forms a pair of twin primes.

6144991 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6144911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3072495 + 3072496.

It is an arithmetic number, because the mean of its divisors is an integer number (3072496).

Almost surely, 2^6144991 is an apocalyptic number.

6144991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6144991 is an equidigital number, since it uses as much as digits as its factorization.

6144991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 6144991 is about 2478.9092359342. The cubic root of 6144991 is about 183.1641256039.

The spelling of 6144991 in words is "six million, one hundred forty-four thousand, nine hundred ninety-one".