5917781 has 2 divisors, whose sum is σ = 5917782. Its totient is φ = 5917780.

The previous prime is 5917771. The next prime is 5917783. The reversal of 5917781 is 1877195.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4558225 + 1359556 = 2135^2 + 1166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5917781 is a prime.

It is a super-2 number, since 2×5917781² = 70040263927922, which contains 22 as substring.

Together with 5917783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5917783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2958890 + 2958891.

It is an arithmetic number, because the mean of its divisors is an integer number (2958891).

Almost surely, 2^5917781 is an apocalyptic number.

It is an amenable number.

5917781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5917781 is an equidigital number, since it uses as much as digits as its factorization.

5917781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 38.

The square root of 5917781 is about 2432.6489676893. The cubic root of 5917781 is about 180.8782286872.

The spelling of 5917781 in words is "five million, nine hundred seventeen thousand, seven hundred eighty-one".