6191399 has 4 divisors (see below), whose sum is σ = 6196536. Its totient is φ = 6186264.

The previous prime is 6191389. The next prime is 6191411. The reversal of 6191399 is 9931916.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6191399 - 2¹⁶ = 6125863 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 (6191389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332 + ... + 3534.

It is an arithmetic number, because the mean of its divisors is an integer number (1549134).

Almost surely, 2^6191399 is an apocalyptic number.

6191399 is a deficient number, since it is larger than the sum of its proper divisors (5137).

6191399 is a wasteful number, since it uses less digits than its factorization.

6191399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5136.

The product of its digits is 13122, while the sum is 38.

The square root of 6191399 is about 2488.2521978288. The cubic root of 6191399 is about 183.6240650656.

The spelling of 6191399 in words is "six million, one hundred ninety-one thousand, three hundred ninety-nine".