6191389 has 2 divisors, whose sum is σ = 6191390. Its totient is φ = 6191388.

The previous prime is 6191371. The next prime is 6191411. The reversal of 6191389 is 9831916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4347225 + 1844164 = 2085^2 + 1358^2 .

It is a cyclic number.

It is not a de Polignac number, because 6191389 - 2¹¹ = 6189341 is a prime.

It is a Chen prime.

6191389 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6191489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3095694 + 3095695.

It is an arithmetic number, because the mean of its divisors is an integer number (3095695).

Almost surely, 2^6191389 is an apocalyptic number.

It is an amenable number.

6191389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6191389 is an equidigital number, since it uses as much as digits as its factorization.

6191389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 37.

The square root of 6191389 is about 2488.2501883854. The cubic root of 6191389 is about 183.6239662058.

The spelling of 6191389 in words is "six million, one hundred ninety-one thousand, three hundred eighty-nine".