5639831 has 2 divisors, whose sum is σ = 5639832. Its totient is φ = 5639830.

The previous prime is 5639813. The next prime is 5639839. The reversal of 5639831 is 1389365.

Together with previous prime (5639813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5639831 is a prime.

It is a super-2 number, since 2×5639831² = 63615387417122, which contains 22 as substring.

It is equal to p₃₈₉₇₄₄ and since 5639831 and 389744 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 5639791 and 5639800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5639839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2819915 + 2819916.

It is an arithmetic number, because the mean of its divisors is an integer number (2819916).

Almost surely, 2^5639831 is an apocalyptic number.

5639831 is a deficient number, since it is larger than the sum of its proper divisors (1).

5639831 is an equidigital number, since it uses as much as digits as its factorization.

5639831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 5639831 is about 2374.8328362224. The cubic root of 5639831 is about 178.0008311201. Note that the first 3 decimals are identical.

The spelling of 5639831 in words is "five million, six hundred thirty-nine thousand, eight hundred thirty-one".