6197491421 has 16 divisors (see below), whose sum is σ = 7122047040. Its totient is φ = 5333569920.

The previous prime is 6197491397. The next prime is 6197491463. The reversal of 6197491421 is 1241947916.

It is a cyclic number.

It is not a de Polignac number, because 6197491421 - 2¹⁸ = 6197229277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6197491021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289151 + ... + 309843.

It is an arithmetic number, because the mean of its divisors is an integer number (445127940).

Almost surely, 2^6197491421 is an apocalyptic number.

It is an amenable number.

6197491421 is a deficient number, since it is larger than the sum of its proper divisors (924555619).

6197491421 is a wasteful number, since it uses less digits than its factorization.

6197491421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22156.

The product of its digits is 108864, while the sum is 44.

The square root of 6197491421 is about 78724.1476359065. The cubic root of 6197491421 is about 1836.8427484841.

The spelling of 6197491421 in words is "six billion, one hundred ninety-seven million, four hundred ninety-one thousand, four hundred twenty-one".