605831861 has 2 divisors, whose sum is σ = 605831862. Its totient is φ = 605831860.

The previous prime is 605831843. The next prime is 605831869. The reversal of 605831861 is 168138506.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602702500 + 3129361 = 24550^2 + 1769^2 .

It is a cyclic number.

It is not a de Polignac number, because 605831861 - 2¹⁰ = 605830837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605831869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302915930 + 302915931.

It is an arithmetic number, because the mean of its divisors is an integer number (302915931).

Almost surely, 2^605831861 is an apocalyptic number.

It is an amenable number.

605831861 is a deficient number, since it is larger than the sum of its proper divisors (1).

605831861 is an equidigital number, since it uses as much as digits as its factorization.

605831861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 605831861 is about 24613.6519232722. The cubic root of 605831861 is about 846.1565159096.

The spelling of 605831861 in words is "six hundred five million, eight hundred thirty-one thousand, eight hundred sixty-one".