5831991 has 12 divisors (see below), whose sum is σ = 9189960. Its totient is φ = 3534480.

The previous prime is 5831983. The next prime is 5832007. The reversal of 5831991 is 1991385.

It is a happy number.

It is not a de Polignac number, because 5831991 - 2³ = 5831983 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5831911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29356 + ... + 29553.

It is an arithmetic number, because the mean of its divisors is an integer number (765830).

Almost surely, 2^5831991 is an apocalyptic number.

5831991 is a deficient number, since it is larger than the sum of its proper divisors (3357969).

5831991 is a wasteful number, since it uses less digits than its factorization.

5831991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58926 (or 58923 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 5831991 is about 2414.9515523091. The cubic root of 5831991 is about 179.9999074074. Note that the first 4 decimals are identical.

Subtracting from 5831991 its reverse (1991385), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 5831991 in words is "five million, eight hundred thirty-one thousand, nine hundred ninety-one".