5905991 has 8 divisors (see below), whose sum is σ = 7269024. Its totient is φ = 4672800.

The previous prime is 5905981. The next prime is 5906003. The reversal of 5905991 is 1995095.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5905991 - 2¹⁴ = 5889607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5905931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32360 + ... + 32541.

It is an arithmetic number, because the mean of its divisors is an integer number (908628).

Almost surely, 2^5905991 is an apocalyptic number.

5905991 is a deficient number, since it is larger than the sum of its proper divisors (1363033).

5905991 is a wasteful number, since it uses less digits than its factorization.

5905991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64921.

The product of its (nonzero) digits is 18225, while the sum is 38.

The square root of 5905991 is about 2430.2244752286. The cubic root of 5905991 is about 180.7580275445.

The spelling of 5905991 in words is "five million, nine hundred five thousand, nine hundred ninety-one".