869337820861 has 2 divisors, whose sum is σ = 869337820862. Its totient is φ = 869337820860.

The previous prime is 869337820759. The next prime is 869337820877. The reversal of 869337820861 is 168028733968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 760235767225 + 109102053636 = 871915^2 + 330306^2 .

It is a cyclic number.

It is not a de Polignac number, because 869337820861 - 2⁹ = 869337820349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 869337820861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869337820891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434668910430 + 434668910431.

It is an arithmetic number, because the mean of its divisors is an integer number (434668910431).

Almost surely, 2^869337820861 is an apocalyptic number.

It is an amenable number.

869337820861 is a deficient number, since it is larger than the sum of its proper divisors (1).

869337820861 is an equidigital number, since it uses as much as digits as its factorization.

869337820861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 869337820861 in words is "eight hundred sixty-nine billion, three hundred thirty-seven million, eight hundred twenty thousand, eight hundred sixty-one".