5991997 has 4 divisors (see below), whose sum is σ = 6536736. Its totient is φ = 5447260.

The previous prime is 5991991. The next prime is 5992003. The reversal of 5991997 is 7991995.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (5991991) and next prime (5992003).

It is a cyclic number.

It is not a de Polignac number, because 5991997 - 2³ = 5991989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5991997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5991991) 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, 272353 + ... + 272374.

It is an arithmetic number, because the mean of its divisors is an integer number (1634184).

Almost surely, 2^5991997 is an apocalyptic number.

It is an amenable number.

5991997 is a deficient number, since it is larger than the sum of its proper divisors (544739).

5991997 is a wasteful number, since it uses less digits than its factorization.

5991997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544738.

The product of its digits is 229635, while the sum is 49.

The square root of 5991997 is about 2447.8555921459. The cubic root of 5991997 is about 181.6312321353.

The spelling of 5991997 in words is "five million, nine hundred ninety-one thousand, nine hundred ninety-seven".