869131685479 has 2 divisors, whose sum is σ = 869131685480. Its totient is φ = 869131685478.

The previous prime is 869131685467. The next prime is 869131685483. The reversal of 869131685479 is 974586131968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 869131685479 - 2⁷ = 869131685351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869131685579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434565842739 + 434565842740.

It is an arithmetic number, because the mean of its divisors is an integer number (434565842740).

Almost surely, 2^869131685479 is an apocalyptic number.

869131685479 is a deficient number, since it is larger than the sum of its proper divisors (1).

869131685479 is an equidigital number, since it uses as much as digits as its factorization.

869131685479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78382080, while the sum is 67.

The spelling of 869131685479 in words is "eight hundred sixty-nine billion, one hundred thirty-one million, six hundred eighty-five thousand, four hundred seventy-nine".