5691931 has 4 divisors (see below), whose sum is σ = 6505072. Its totient is φ = 4878792.

The previous prime is 5691929. The next prime is 5691943. The reversal of 5691931 is 1391965.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1391965 = 5 ⋅278393.

It is a cyclic number.

It is not a de Polignac number, because 5691931 - 2¹ = 5691929 is a prime.

It is a super-2 number, since 2×5691931² = 64796157017522, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (5691131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406560 + ... + 406573.

It is an arithmetic number, because the mean of its divisors is an integer number (1626268).

Almost surely, 2^5691931 is an apocalyptic number.

5691931 is a deficient number, since it is larger than the sum of its proper divisors (813141).

5691931 is an equidigital number, since it uses as much as digits as its factorization.

5691931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813140.

The product of its digits is 7290, while the sum is 34.

The square root of 5691931 is about 2385.7768126964. The cubic root of 5691931 is about 178.5472678321.

Adding to 5691931 its sum of digits (34), we get a palindrome (5691965).

It can be divided in two parts, 569 and 1931, that added together give a square (2500 = 50²).

The spelling of 5691931 in words is "five million, six hundred ninety-one thousand, nine hundred thirty-one".