868540877 has 2 divisors, whose sum is σ = 868540878. Its totient is φ = 868540876.

The previous prime is 868540853. The next prime is 868540891. The reversal of 868540877 is 778045868.

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., 859017481 + 9523396 = 29309^2 + 3086^2 .

It is a cyclic number.

It is not a de Polignac number, because 868540877 - 2²² = 864346573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868540837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434270438 + 434270439.

It is an arithmetic number, because the mean of its divisors is an integer number (434270439).

Almost surely, 2^868540877 is an apocalyptic number.

It is an amenable number.

868540877 is a deficient number, since it is larger than the sum of its proper divisors (1).

868540877 is an equidigital number, since it uses as much as digits as its factorization.

868540877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3010560, while the sum is 53.

The square root of 868540877 is about 29471.0175765955. The cubic root of 868540877 is about 954.1062797385.

The spelling of 868540877 in words is "eight hundred sixty-eight million, five hundred forty thousand, eight hundred seventy-seven".