865348877 has 2 divisors, whose sum is σ = 865348878. Its totient is φ = 865348876.

The previous prime is 865348853. The next prime is 865348919. The reversal of 865348877 is 778843568.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605848996 + 259499881 = 24614^2 + 16109^2 .

It is a cyclic number.

It is not a de Polignac number, because 865348877 - 2²⁶ = 798240013 is a prime.

It is a super-2 number, since 2×865348877² = 1497657357850322258, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865341877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432674438 + 432674439.

It is an arithmetic number, because the mean of its divisors is an integer number (432674439).

Almost surely, 2^865348877 is an apocalyptic number.

It is an amenable number.

865348877 is a deficient number, since it is larger than the sum of its proper divisors (1).

865348877 is an equidigital number, since it uses as much as digits as its factorization.

865348877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9031680, while the sum is 56.

The square root of 865348877 is about 29416.8128287209. The cubic root of 865348877 is about 952.9360236460.

The spelling of 865348877 in words is "eight hundred sixty-five million, three hundred forty-eight thousand, eight hundred seventy-seven".