5899991 has 2 divisors, whose sum is σ = 5899992. Its totient is φ = 5899990.

The previous prime is 5899979. The next prime is 5899997. The reversal of 5899991 is 1999985.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5899991 - 2¹⁰ = 5898967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5899997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2949995 + 2949996.

It is an arithmetic number, because the mean of its divisors is an integer number (2949996).

Almost surely, 2^5899991 is an apocalyptic number.

5899991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5899991 is an equidigital number, since it uses as much as digits as its factorization.

5899991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 50.

The square root of 5899991 is about 2428.9897076768. The cubic root of 5899991 is about 180.6967950523.

Adding to 5899991 its sum of digits (50), we get a square (5900041 = 2429²).

The spelling of 5899991 in words is "five million, eight hundred ninety-nine thousand, nine hundred ninety-one".