5931661 has 2 divisors, whose sum is σ = 5931662. Its totient is φ = 5931660.

The previous prime is 5931649. The next prime is 5931697. The reversal of 5931661 is 1661395.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4536900 + 1394761 = 2130^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 5931661 - 2⁷ = 5931533 is a prime.

It is the 2436-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5931641) by changing a digit.

It is a nontrivial repunit in base 2435.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2965830 + 2965831.

It is an arithmetic number, because the mean of its divisors is an integer number (2965831).

Almost surely, 2^5931661 is an apocalyptic number.

It is an amenable number.

5931661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5931661 is an equidigital number, since it uses as much as digits as its factorization.

5931661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 31.

The square root of 5931661 is about 2435.5001539725. The cubic root of 5931661 is about 181.0195333151.

The spelling of 5931661 in words is "five million, nine hundred thirty-one thousand, six hundred sixty-one".