5991857 has 2 divisors, whose sum is σ = 5991858. Its totient is φ = 5991856.

The previous prime is 5991851. The next prime is 5991883. The reversal of 5991857 is 7581995.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3964081 + 2027776 = 1991^2 + 1424^2 .

It is a cyclic number.

It is not a de Polignac number, because 5991857 - 2⁴ = 5991841 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5991851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2995928 + 2995929.

It is an arithmetic number, because the mean of its divisors is an integer number (2995929).

Almost surely, 2^5991857 is an apocalyptic number.

It is an amenable number.

5991857 is a deficient number, since it is larger than the sum of its proper divisors (1).

5991857 is an equidigital number, since it uses as much as digits as its factorization.

5991857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 44.

The square root of 5991857 is about 2447.8269955207. The cubic root of 5991857 is about 181.6298175501.

The spelling of 5991857 in words is "five million, nine hundred ninety-one thousand, eight hundred fifty-seven".