5951999 has 4 divisors (see below), whose sum is σ = 5964336. Its totient is φ = 5939664.

The previous prime is 5951993. The next prime is 5952007. The reversal of 5951999 is 9991595.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9991595 = 5 ⋅1998319.

It is a cyclic number.

It is not a de Polignac number, because 5951999 - 2⁴ = 5951983 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 (5951993) 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, 5414 + ... + 6419.

It is an arithmetic number, because the mean of its divisors is an integer number (1491084).

Almost surely, 2^5951999 is an apocalyptic number.

5951999 is a deficient number, since it is larger than the sum of its proper divisors (12337).

5951999 is a wasteful number, since it uses less digits than its factorization.

5951999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12336.

The product of its digits is 164025, while the sum is 47.

The square root of 5951999 is about 2439.6719041707. The cubic root of 5951999 is about 181.2261856940.

The spelling of 5951999 in words is "five million, nine hundred fifty-one thousand, nine hundred ninety-nine".